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Vizio P Series Quantum X 2019  TV Review

Reviewed Jul 08, 2019 at 12:39pm
Test bench update May 11, 2020 at 09:41am
Tested using methodology v1.5 
Vizio P Series Quantum X 2019
8.1
Mixed Usage 
Value for price beaten by

Not at the latest test bench

8.4
Movies 
Value for price beaten by

Not at the latest test bench

7.9
TV Shows 
Value for price beaten by

Not at the latest test bench

7.9
Sports 
Value for price beaten by

Not at the latest test bench

8.0
Video Games 
Value for price beaten by

Not at the latest test bench

8.5
HDR Movies 
Value for price beaten by

Not at the latest test bench

7.8
HDR Gaming 
Value for price beaten by

Not at the latest test bench

7.7
PC Monitor 
Value for price beaten by

Not at the latest test bench

 0
 TV Settings
Notice: This TVs was replaced by Vizio P Series Quantum X 2020
The Vizio P Series Quantum X is an excellent 4k LED LCD TV. It delivers great overall picture quality with deep, uniform blacks, outstanding peak brightness, and a great local dimming feature. Motion looks great, thanks to the outstanding response time. It also has excellent low input lag, ensuring a responsive gaming experience, although it doesn't support any of the advanced gaming features, like FreeSync, found on some other TVs. Unfortunately, the image degrades when viewed at an angle, and there is noticeable banding in areas of similar color.

Our Verdict

8.1
Mixed Usage 

The Vizio P Series Quantum X is an excellent TV for most uses. It looks great in almost any room but has narrow viewing angles, so it isn't as good for watching sports with a group of friends or playing co-op games. Fast movies and games look great, thanks to the fast response time, and games are responsive due to the low input lag.

Pros
  • Outstanding peak brightness in SDR and HDR.
  • Deep, uniform blacks.
  • Great motion handling.
Cons
  • Image degrades when viewed at an angle.
8.4
Movies 

This is an excellent TV for watching movies in a dark room. It has an excellent contrast ratio and a great local dimming feature, so it delivers deep, uniform blacks. Fast-moving action scenes look great, with very little blur, thanks to the fast response time, although this lack of blur does result in a bit more noticeable stutter. This TV also gets extremely bright in both SDR and HDR. Unfortunately, lower resolution movies don't look quite as good, as the 480p upscaling isn't as good as most other TVs.

Pros
None
Cons
None
7.9
TV Shows 

The is a great TV for watching your favorite TV shows during the day. It has excellent reflection handling and can get extremely bright, so glare should never be an issue, even in an extremely bright room. This TV also has a good selection of built-in apps, covering some of the most popular streaming apps, but it isn't possible to add more apps. Unfortunately, due to the poor viewing angle, this TV is best enjoyed from directly in front, so it isn't a great choice if you like to move around with the TV on. Cable content also doesn't look quite as good on this TV, as the 720p upscaling isn't as good as most other brands.

Pros
None
Cons
None
7.9
Sports 

Overall, this is a great TV for watching sports. The P Series Quantum X can get extremely bright and has great reflection handling, so there shouldn't be any issues with glare in a bright room. It has an excellent response time, so fast-moving objects, like the players, look great, with very little blur behind them. Unfortunately, this TV isn't well-suited for watching the big game with a group of friends, as the image degrades when viewed at an angle.

Pros
None
Cons
None
8.0
Video Games 

This is an excellent TV for playing video games. It has excellent low input lag for a responsive gaming experience, and it delivers very smooth motion with very little blur behind fast-moving objects. This TV also looks great in almost any room, as it can easily handle glare in a bright room, and also has excellent contrast for late-night gaming. Unfortunately, it doesn't support any advanced gaming features, like FreeSync. This TV also isn't as well-suited for co-op gaming, as the image degrades when viewed at an angle.

Pros
None
Cons
None
8.5
HDR Movies 

The P Series Quantum X is an excellent TV for watching HDR movies in a dark room. It looks great in a dark room, as it has excellent contrast and a great local dimming feature. This is a remarkably bright TV, and small highlights in some scenes in HDR really stand out, the way the creator intended. This TV also has an outstanding color gamut and great color volume. Fast-moving objects look great, thanks to the fast response time, but this does result in a bit more noticeable stutter when watching movies.

Pros
None
Cons
None
7.8
HDR Gaming 

This is an excellent TV for HDR gaming. It has excellent low input lag, delivering a responsive gaming experience, and fast-moving objects in your favorite games look great, thanks to the fast response time. HDR games can get extremely bright, and they look great in a dark room, thanks to the excellent contrast ratio. Unfortunately, it lacks any advanced gaming features, like support for FreeSync variable refresh rate.

Pros
None
Cons
None
7.7
PC Monitor 

Overall, this is an excellent TV for use as a PC monitor. It has a fast response time, so there is little distracting blur trail around fast-moving objects, and it has excellent low input lag for a responsive experience. It can also get extremely bright and has excellent reflection handling, so it has no issues overcoming glare. Unfortunately, this TV has a poor viewing angle, and the sides of the screen appear non-uniform if you're sitting too close.

Pros
None
Cons
None
  • 8.1
    Mixed Usage
  • 8.4
    Movies
  • 7.9
    TV Shows
  • 7.9
    Sports
  • 8.0
    Video Games
  • 8.5
    HDR Movies
  • 7.8
    HDR Gaming
  • 7.7
    PC Monitor
  • Changelog

    1.  Updated May 21, 2020: Converted to Test Bench 1.5.
    2.  Updated Feb 21, 2020: Converted to Test Bench 1.4.
    3.  Updated Jul 08, 2019: Review published.
    4.  Updated Jul 06, 2019: Our testers have started testing this product.

    Check Price

    Differences Between Sizes And Variants

    We tested the 65" Vizio P Series Quantum X (PX65-G1), and we expect our results to be valid for the 75" (PX75-G1) model as well.

    If someone comes across a different type of panel or if their Vizio P Series Quantum X doesn't correspond to our review, let us know and we will update the review. Note that some tests, such as the gray uniformity, may vary between individual units.

    Size Model Dimming Zones
    65" PX65-G1 384
    75" PX75-G1 480

    We don't know the manufacturing date of our PX65-G1, but the label is available here.

    Popular TV Comparisons

    Comparison picture

    Top left: Vizio P-Series Quantum 2019 (P659-G1). Bottom left: LG C9 (OLED55C9). Middle: Vizio P-Series Quantum X 2019 (PX65-G1). Top right: Samsung Q90R (QN65Q90R). Bottom right: LG SM9500 (65SM9500). Unlike our other photographs, this picture wasn't taken under a controlled environment, so do not draw conclusions from it.

    The Vizio P Series Quantum X is an excellent TV for most uses, and it outperforms many pricier models. See our recommendations for the best TVs, the best 4k TVs, the best 4k gaming TVs.

    LG C9 OLED

    The LG C9 OLED and the Vizio P Series Quantum X 2019 use different panel types, each with their strengths and weaknesses. The C9 is better for a dark room, and it has incredibly wide viewing angles. The C9 also has a nearly-instantaneous response time, outstanding low input lag, and some great future-proof features, like 4 HDMI 2.1 ports. As an OLED TV, the C9 does have a risk of permanent burn-in. The Quantum X, on the other hand, is much brighter, and small highlights in HDR movies look much closer to what the director intended. There is also no chance of burn-in with the Quantum X.

    Vizio P Series 2018

    The Vizio P Series Quantum X 2019 is a bit better than the Vizio P Series 2018. The X 2019 can handle reflections a little better when in a bright room. It has more dimming zones, which results in better contrast with local dimming, which is important for dark room performance. The X 2019 can also get much brighter in HDR.

    Vizio P Series Quantum 2018

    The Vizio P Series Quantum X 2019 and the Vizio P Series Quantum 2018 are nearly identical. The Quantum X has a slightly wider color gamut. The Quantum X has nearly double the local dimming zones, and although the overall performance is similar, the new model has less noticeable blooming around bright objects. Any other differences between them can larger be attributed to panel variance, and do not necessarily represent a real difference.

    Vizio M Series Quantum 2019

    The Vizio P Series Quantum X 2019 is a slightly better TV than the Vizio M Series Quantum 2019 for most uses. The Quantum X looks more premium and well-built and has a few more input options. It's a much better choice if you watch a lot of HDR movies or game in HDR, as its screen can get significantly brighter, especially with HDR content. Its brighter screen also makes it better suited for very well-lit rooms as it shows much fewer reflections. On the other hand, the M Series Quantum has better black uniformity, much more accurate colors out of the box, much better gradient performance, and better built-in speakers.

    Show more 

    Video

    Test Results

    perceptual testing image
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    Market Context
    Market Context

    The Vizio P Series Quantum X is Vizio's top TV for 2019, and is the direct replacement for the 2018 Vizio P Series Quantum. The main competitors from a performance standpoint are the Samsung Q80R, the Samsung Q90R, and the Sony X950G.

    Design
    8.5
    Style
    CurvedNo

    The Vizio P Series Quantum X has a great design, and is identical to last year's Vizio P Series Quantum. The stand has a nice metal finish and supports the TV well, but the two feet are nearly the full width of the TV, so you'll need a wide stand if you aren't VESA mounting it. This TV, like last year's, has very good build quality, with no obvious points of concern.

    Stand

    The stand is slim but well-built, and it supports the TV well. Unfortunately, the feet are very wide and can't be reversed, so you'll need a very wide table if you aren't wall-mounting it.

    Footprint of the 65" stand: 50.8" x 11.7".

    Back
    Wall MountVESA 400x400

    The back of the TV is plain, made up of a single textured plastic panel. The inputs face down and to the side, and they are easy to access when the TV is VESA mounted.

    Unfortunately, there is no cable management.

    Borders
    Borders0.35" (0.9 cm)

    The borders are thin and aren't distracting at all when watching TV.

    Thickness
    Max Thickness2.72" (6.9 cm)

    The TV is relatively thin and doesn't stand out very much when viewed edge-on. It looks great when wall-mounted, but isn't as thin as OLED TVs like the LG C9.

    8.0
    Build Quality

    The P Series Quantum X appears to be well-built, with no obvious deficiencies or weak points.

    Picture Quality
    9.1
    Contrast
    Native Contrast
    5,414 : 1
    Contrast with local dimming
    14,743 : 1

    The P Series Quantum X has an outstanding native contrast ratio and delivers extremely deep blacks, even with the local dimming feature off. With local dimming enabled, the contrast ratio is one of the best we've ever measured, similar to the 2018 Vizio P Series Quantum and the Samsung Q9FN.

    8.0
    Local Dimming
    Local Dimming
    Yes
    Backlight
    Full-Array

    Update 07/16/2019: Text updated to clarify settings.

    The full array local dimming feature is extremely effective at dimming dark areas on the screen and is one of the best we've ever seen. It reacts quickly to fast scene changes, but can't always keep up, and it tends to dim the outside edges of bright, fast-moving objects, which can be noticeable in some scenes.

    There is noticeably less blooming around bright objects than last year's model. There can still be some noticeable blooming around subtitles in dark scenes though, as well as around very bright objects in dark scenes, but it's better than previous models.

    If you enjoy local dimming and don't mind some variation in screen brightness or blooming, then set local dimming to 'Medium'. This does increase the overall brightness of the image, though, and can result in distracting blooming around bright objects. If you prefer a less aggressive local dimming implementation or find the brightness too high after decreasing the 'Backlight' then set it to 'Low', or disable local dimming completely if you don't like the changes in brightness.

    The setting that controls the backlight is known as Active Full Array. During testing, we discovered that adjusting this setting sometimes caused the Black Frame Insertion feature to be disabled.

    Note: The 75" model has more dimming zones, and we expect the local dimming feature to perform slightly better.

    8.9
    SDR Peak Brightness
    SDR Real Scene Peak Brightness
    637 cd/m²
    SDR Peak 2% Window
    2,005 cd/m²
    SDR Peak 10% Window
    2,351 cd/m²
    SDR Peak 25% Window
    1,832 cd/m²
    SDR Peak 50% Window
    1,001 cd/m²
    SDR Peak 100% Window
    595 cd/m²
    SDR Sustained 2% Window
    1,446 cd/m²
    SDR Sustained 10% Window
    1,694 cd/m²
    SDR Sustained 25% Window
    1,684 cd/m²
    SDR Sustained 50% Window
    924 cd/m²
    SDR Sustained 100% Window
    591 cd/m²
    SDR ABL
    0.001

    The 2019 Vizio P Series Quantum X has outstanding peak brightness in SDR, very close to the Sony Z9F and 2018 Vizio P Series Quantum.

    We measured the peak brightness after calibration, with the 'Calibrated Dark' Picture Mode, Local Dimming set to 'Medium', and the Color Temperature set to 'Normal'.

    If you prefer a brighter image, or a colder color temperature over an accurate one, with the 'Standard' Picture Mode we measured a peak brightness of 2922 cd/m² for a short period of time, as measured on the 10% test window.

    By design, the TV dims when it detects a static pattern, including our test patterns. Vizio sent us instructions on how to work around this, but we were still unable to get consistent results, as the TV's brightness is very finicky.

    9.2
    HDR Peak Brightness
    HDR Real Scene Peak Brightness
    1,406 cd/m²
    HDR Peak 2% Window
    1,800 cd/m²
    HDR Peak 10% Window
    2,373 cd/m²
    HDR Peak 25% Window
    1,826 cd/m²
    HDR Peak 50% Window
    1,015 cd/m²
    HDR Peak 100% Window
    604 cd/m²
    HDR Sustained 2% Window
    1,298 cd/m²
    HDR Sustained 10% Window
    1,705 cd/m²
    HDR Sustained 25% Window
    1,671 cd/m²
    HDR Sustained 50% Window
    921 cd/m²
    HDR Sustained 100% Window
    601 cd/m²
    HDR ABL
    0.056

    This TV can get extremely bright in HDR. Small highlights in some scenes are extremely bright, which is great. Even large, bright scenes are very bright, although not quite as bright as last year's model.

    We tested the HDR peak brightness with no calibration settings, using the 'Calibrated Dark' Picture Mode, with the Backlight set to '50', and local dimming set to 'Medium'.

    If accuracy isn't as important to you, or if you prefer a colder color temperature, the 'Standard' Picture Mode hit a peak brightness of 2741 cd/m² for a short period of time, with the Color Temperature set to 'cool', and local dimming on 'High'.

    By design, this TV dims the screen when it detects static images, like our test patterns. Vizio sent us instructions on how to work around this, but we still weren't able to get consistent results.

    7.1
    Gray Uniformity
    50% Std. Dev.
    4.482%
    50% DSE
    0.178%
    5% Std. Dev.
    1.614%
    5% DSE
    0.112%

    Decent gray uniformity, but the sides of the screen are noticeably darker. There is also noticeable dirty screen effect (DSE) in the center of the screen, which isn't great for watching sports. In near-dark scenes, the uniformity is much better, with no significant issues.

    5.2
    Viewing Angle
    Color Washout
    23°
    Color Shift
    21°
    Brightness Loss
    36°
    Black Level Raise
    13°
    Gamma Shift
    17°

    The P Series Quantum X has a poor viewing angle. Moving off-center, the image loses brightness, and the black level increases, causing the image to appear washed-out. At even moderate angles colors lose accuracy and appear washed-out.

    Like the Vizio P Series Quantum, this TV has an optional 'Enhanced Viewing Angle' feature, which is intended to improve viewing angle performance. We measured both and found no advantage for enabling this feature. When it is enabled, it changes the TV's sub-pixel dimming, which reduces the overall color resolution and causes some noticeable issues.

    During testing, when changing inputs the Enhanced Viewing Angle function would engage itself automatically, but the setting still shows 'Off'. To disable it, we had to turn it on, then off again.

    8.1
    Black Uniformity
    Native Std. Dev.
    1.008%
    Std. Dev. w/ L.D.
    0.410%

    Great black uniformity, which is great for dark-room viewing. With local dimming disabled, there is some very slight clouding visible. Once local dimming is enabled, though, the black uniformity is significantly better, and there is no noticeable clouding around the white test cross.

    8.9
    Reflections
    Screen Finish
    Glossy
    Total Reflections
    2.2%
    Indirect Reflections
    0.2%
    Calculated Direct Reflections
    2.0%

    Excellent reflection handling, very similar to last year's P Series Quantum. Unlike many high-end TVs, there is no purplish tint from the anti-reflective layer.

    6.7
    Pre Calibration
    White Balance dE
    4.03
    Color dE
    3.10
    Gamma
    2.22
    Color Temperature
    5,803 K
    Picture Mode
    Calibrated Dark
    Color Temp Setting
    Normal
    Gamma Setting
    2.2

    With our pre-calibration settings, this TV has decent accuracy. There are some noticeable color inaccuracies, and there are noticeable inaccuracies in brighter shades of gray. The average gamma is close to the calibration target of 2.2, but some scenes are over-brightened, and some are too dark.

    9.6
    Post Calibration
    White Balance dE
    0.36
    Color dE
    0.76
    Gamma
    2.20
    Color Temperature
    6,452 K
    White Balance Calibration
    11 point
    Color Calibration
    Yes
    Auto-Calibration Function
    No

    This TV has a full white balance and color calibration system, and after calibration, it has outstanding accuracy. Color and white balance accuracy are both significantly improved, and any remaining inaccuracies aren't noticeable. The color temperature is close to our target of 6500K, and gamma follows the target almost perfectly.

    You can see our recommended settings here.

    7.0
    480p Input

    Like all other Vizio TVs we've tested, 480p content, like DVDs, is upscaled decently but appears a bit more blocky than other TVs.

    7.0
    720p Input

    720p content, like from a cable box, looks decent, but like other Vizio TVs we've tested, the image is a bit worse than most other TVs.

    9.0
    1080p Input

    1080p content, like Blu-ray movies or older game consoles, looks almost as good as native 4k content.

    10
    4k Input

    4k content looks great. When the TV's Enhanced Viewing Angle feature is enabled, the TV uses spatial dithering, which can cause issues with some content, as shown by the shadows in this image.

    This TV also always applies an edge enhancement, even when Sharpness is set to '0'. This results in some noticeable issues, as seen here.

    0.0
    8k Input
    Pixels
    TypeLED
    Sub-Type
    VA

    When the enhanced viewing angle feature is enabled, some subpixels are partially dimmed, as shown here.

    9.0
    Color Gamut
    Wide Color Gamut
    Yes
    DCI P3 xy
    96.34%
    DCI P3 uv
    97.94%
    Rec 2020 xy
    79.00%
    Rec 2020 uv
    85.55%

    The P Series Quantum X has an outstanding color gamut, one of the best we've ever measured. It covers almost the entire DCI-P3 color space, and has the best Rec. 2020 coverage of any TV we've tested so far.

    Some dark scenes appear too dark, but otherwise this TV follows the PQ EOTF curve well, before tone-mapping near the TV's peak brightness. In 'Game' mode, the EOTF is identical.

    If you find HDR too dim, check out our recommended settings here. With these settings, HDR content appears much brighter on the Vizio P Series Quantum X 2019, as shown here.

    8.0
    Color Volume
    Normalized DCI P3 Coverage ITP
    84.1%
    10,000 cd/m² DCI P3 Coverage ITP
    60.7%
    Normalized Rec 2020 Coverage ITP
    76.4%
    10,000 cd/m² Rec 2020 Coverage ITP
    52.2%

    This TV has great color volume. It can display dark saturated colors, and bright colors are close to the TV's peak brightness.

    6.9
    Gradient
    Color Depth
    10 Bit
    Red (Std. Dev.)
    0.140
    Green (Std. Dev.)
    0.147
    Blue (Std. Dev.)
    0.113
    Gray (Std. Dev.)
    0.197

    Update 08/19/2019: We updated the firmware to version 3.0.8.2-1 and retested the gradients. There is slightly less banding in all colors, but not enough to make a noticeable difference.

    Decent gradient handling, but there is mild banding in almost all shades, and there is more significant banding in dark greens and grays. Unfortunately, the Reduce Noise feature does not appear to improve gradients at all.

    10
    Temporary Image Retention
    IR after 0 min recovery
    0.00%
    IR after 2 min recovery
    0.00%
    IR after 4 min recovery
    0.00%
    IR after 6 min recovery
    0.00%
    IR after 8 min recovery
    0.00%
    IR after 10 min recovery
    0.00%

    There is no noticeable image retention on the PX65-G1, even immediately after displaying our high-contrast test image for 10 minutes.

    10
    Permanent Burn-In Risk
    Permanent Burn-In Risk
    No

    We don't expect VA panels to experience permanent image retention, as the VA panel in our long-term test appears immune.

    Motion
    8.5
    Response Time
    80% Response Time
    3.5 ms
    100% Response Time
    9.9 ms

    The Vizio PX65-G1 has an excellent response time, very similar to last year's model. There is some overshoot in some transitions, which can cause some inverse ghosting, but this shouldn't be that noticeable. There are noticeable duplications in our response time photo due to the backlight flicker.

    4.0
    Flicker-Free
    Flicker-Free
    No
    PWM Dimming Frequency
    120 Hz

    Unfortunately, this TV uses PWM to dim the backlight, and there is a 120Hz flicker at all backlight levels other than max. This results in duplications in motion, which might be noticeable in certain content.

    Although we initially measured a 960Hz flicker on the Vizio P Series 2018 and Vizio P Series Quantum, which is much less noticeable, we have retested them and found that they also flicker at 120Hz now. We don't know when this change occurred, but it was likely in one of the firmware updates over the past year.

    10
    Black Frame Insertion (BFI)
    Optional BFI
    Yes
    Min Flicker for 60 fps
    60 Hz
    60 Hz for 60 fps
    Yes
    120 Hz for 120 fps
    Yes
    Min Flicker for 60 fps in Game Mode
    60 Hz

    For even clearer motion, this TV has an optional black frame insertion(BFI) feature, which reduces the backlight flicker frequency to 60Hz. There was a bug during testing, where adjusting the local dimming feature to a higher setting disabled this feature.

    We found the BFI feature to behave very erratically. When enabling this feature, we found that it wouldn't always start flickering at the right time, which resulted in strobe crosstalk duplications. It appears to be random, but enabling Game Low Latency appears to be more likely to get a perfect image.

    When BFI is enabled, a compensation algorithm is engaged to try and compensate for the normally reduced brightness. This is why the image appears so different from our usual BFI photos.

    Motion Interpolation
    Motion Interpolation (30 fps)
    Yes
    Motion Interpolation (60 fps)
    Yes

    The Vizio P Series Quantum X has a 120Hz panel and can interpolate lower frame rate content up to that refresh rate. Like last year's model, the motion interpolation feature is very aggressive, and there are noticeable artifacts in busy scenes.

    Learn more about the motion interpolation feature, and how to adjust it, here.

    6.7
    Stutter
    Frame Hold Time @ 24 fps
    31.8 ms
    Frame Hold Time @ 60 fps
    6.8 ms

    Due to the fast response time, there is some noticeable stutter, especially when watching 24p content like movies. This is especially noticeable with slow, panning shots. If stutter bothers you, the motion interpolation feature can help, by increasing the frame rate of your content.

    7.8
    24p Judder
    Judder-Free 24p
    Yes
    Judder-Free 24p via 60p
    No
    Judder-Free 24p via 60i
    No
    Judder-Free 24p via Native Apps
    Yes

    The Vizio P Series Quantum X can remove judder from any 24p source, including from the native apps, but it can't remove judder from 60 i/p sources, like a cable box. For 24p sources, no special settings are required; the TV always plays them without judder.

    0.0
    Variable Refresh Rate
    Native Refresh Rate
    120 Hz
    Variable Refresh Rate
    No
    HDMI Forum VRR
    No
    FreeSync
    No
    G-SYNC Compatible
    No
    4k VRR Maximum
    N/A
    4k VRR Minimum
    No VRR support
    1080p VRR Maximum
    N/A
    1080p VRR Minimum
    No VRR support
    1440p VRR Maximum
    N/A
    1440p VRR Minimum
    No VRR support
    VRR Supported Connectors
    No VRR support

    The P Series Quantum X 2019 has a 120Hz refresh rate, but it doesn't support any variable refresh rate technologies, like FreeSync or HDMI Forum's VRR feature.

    Inputs
    8.3
    Input Lag
    1080p @ 60 Hz
    14.7 ms
    1080p @ 60 Hz Outside Game Mode
    89.7 ms
    1440p @ 60 Hz
    N/A
    4k @ 60 Hz
    16.6 ms
    4k @ 60 Hz + 10 bit HDR
    26.1 ms
    4k @ 60 Hz @ 4:4:4
    26.0 ms
    4k @ 60 Hz Outside Game Mode
    83.1 ms
    4k @ 60 Hz With Interpolation
    83.8 ms
    8k @ 60 Hz
    N/A
    1080p @ 120 Hz
    10.5 ms
    1440p @ 120 Hz
    N/A
    4k @ 120 Hz
    N/A
    1080p with Variable Refresh Rate
    N/A
    1440p with VRR
    N/A
    4k with VRR
    N/A
    8k with VRR
    N/A
    Auto Low Latency Mode (ALLM)
    No

    The Vizio P Series Quantum X has excellent low input lag. Unlike most other TVs, the low latency mode can be applied to any picture mode, simply by enabling the Low Latency setting.

    This TV, like previous Vizio TVs, has a low latency port (HDMI Port 5). This port delivers the lowest input lag possible, but does not support HDR.

    We also measured the input lag on HDMI port 1:

    Test HDMI 1 HDMI 5
    1080p @ 60 Hz 25.6 14.7
    Out of Game Mode 136.8 89.7
    1080p @ 120 Hz 29.6 10.5
    4k @ 60 Hz 26.0 16.6
    + HDR 26.1 N/A
    + 4:4:4 26.0 N/A
    Out of Game Mode 151.1 83.1
    With Interpolation 143.2 83.8

    This TV does not support auto low latency mode (ALLM).

    8.3
    Supported Resolutions
    Resolution4k
    1080p @ 60 Hz @ 4:4:4
    Yes
    1080p @ 120 Hz
    Yes (native support)
    1440p @ 60 Hz
    No
    1440p @ 120 Hz
    No
    4k @ 60 Hz
    Yes
    4k @ 60 Hz @ 4:4:4
    Yes
    4k @ 120 Hz
    No
    8k @ 30 Hz or 24 Hz
    No
    8k @ 60 Hz
    No

    The P Series Quantum X supports most common input formats but does not support 1440p. All supported formats can display proper 4:4:4, as long as the Picture Mode is set to 'Computer'. This is especially important when using it as a PC monitor. Some formats require the full bandwidth of HDMI 2.0, and the Full UHD Color setting has to be enabled for the port used.

    HDMI port 5 is a low-latency port, and it does not support some formats. HDR is not supported, and although 4k @ 60Hz is supported, it only works at 4:2:0.

    Input Photos
    Total Inputs
    HDMI5
    USB1
    Digital Optical Audio Out1
    Analog Audio Out 3.5mm0
    Analog Audio Out RCA1
    Component In1 (shared)
    Composite In1 (shared)
    Tuner (Cable/Ant)1
    Ethernet1
    DisplayPort0
    IR In0
    SD/SDHC0
    Inputs Specifications
    HDR10
    Yes
    HDR10+
    Yes
    Dolby Vision
    Yes
    HLG
    Yes
    3D
    No
    HDMI 2.0 Full Bandwidth
    Yes (HDMI 1,2,3,4)
    HDMI 2.1
    No
    CECYes
    HDCP 2.2Yes (HDMI 1,2,3,4,5)
    USB 3.0
    No
    Variable Analog Audio OutYes
    Wi-Fi SupportYes (2.4 GHz, 5 GHz)

    Update 12/09/2019: Vizio has added support for HDR10+ on many 2019 and 2018 models.

    HDMI port 5 is a low bandwidth port designed for low input lag, but it does not support some formats, including HDR and 4:4:4.

    Audio Passthrough
    ARC
    Yes (HDMI 1)
    eARC support
    No
    Dolby Atmos via TrueHD via eARC
    No
    DTS:X via DTS-HD MA via eARC
    No
    5.1 Dolby Digital via ARC
    Yes
    5.1 DTS via ARC
    Yes
    5.1 Dolby Digital via Optical
    Yes
    5.1 DTS via Optical
    Yes

    The P Series Quantum X does not support eARC.

    To output DTS over the optical connection, we had to manually set the audio to 'Bitstream'.

    Sound Quality
    4.4
    Frequency Response
    See details on graph tool
    Low-Frequency Extension
    142.54 Hz
    Std. Dev. @ 70
    5.07 dB
    Std. Dev. @ 80
    5.66 dB
    Std. Dev. @ Max
    5.59 dB
    Max
    70.1 dB SPL
    Dynamic Range Compression
    1.42 dB

    The frequency response of our unit is bad, but something might be wrong with our unit, so your experience may vary. For reference, last year's P Series Quantum frequency response was average.

    Low-frequency extension (LFE) is very high, and this TV has very little bass, with no thump or rumble and very little punch, but it produces well-balanced and clear dialog. Our unit can't get very loud, though, and is not suited for loud environments.

    Note that there is an error in our graph due to a bug, which scales the green line up to 80dB. This line should be at the same place as the red and blue lines.

    8.2
    Distortion
    See details on graph tool
    Weighted THD @ 80
    0.060
    Weighted THD @ Max
    0.059
    IMD @ 80
    0.68%
    IMD @ Max
    0.83%

    As our unit can't get very loud, there is very little distortion, which is great. Total distortion at 80 and at Max were both measured at the TV's maximum volume of about 70 dB SPL.

    Smart Features
    7.0
    Interface
    Smart OSSmartCast
    Version1.27
    Ease of Use
    Easy
    Smoothness
    Not Smooth
    Time Taken to Select YouTube
    3 s
    Time Taken to Change Backlight
    3 s
    Advanced Options
    Many

    Update 11/26/2019: We've retested the TV with the latest SmartCast interface, and found it to be much faster.

    The interface is very easy to use, as it isn't very complex. With the latest update, it's very fast, but isn't very smooth.

    10
    Ad-Free
    Ads
    No
    Opt-out
    No Add
    Suggested Content in Home
    Yes
    Opt-out of Suggested Content
    No

    Update 09/28/2020: We've received reports of ads on the Vizio P Series Quantum X 2019. Let us know in the discussions below if you have this TV and have also seen ads.

    Update 07/07/2020: The text incorrectly stated that the suggested content can be removed.

    The Quantum X is completely ad-free, which is great. Unlike the Sony TVs that run Android TV 8.0, there are no ads, only a row of suggested content, which unfortunately can't be completely disabled from the menu.

    6.5
    Apps and Features
    App Selection
    Great
    App Smoothness
    Average
    Cast Capable
    Yes
    USB Drive Playback
    Yes
    USB Drive HDR Playback
    Yes
    HDR in Netflix
    Yes
    HDR in YouTube
    Yes

    The Vizio SmartCast platform system is very limited and has only a few pre-installed apps. Unfortunately, there is no way to install additional apps directly to the TV; instead, they have to be cast to the TV from your mobile device.

    6.0
    Remote
    Size
    Medium
    Voice Control
    No
    CEC Menu Control
    Yes
    Other Smart Features
    No
    Remote AppVizio SmartCast Mobile

    Update 07/24/2020: A user has informed us that at least some newer units of the Vizio P Series Quantum X 2019 are shipping with a different remote.

    The remote is identical to last year's model. It's very basic but easy to use, and the compact rubber buttons are comfortable. There is no mic integrated into the remote for voice controls.

    TV Controls

    The physical controls are located on the back, right-hand side (when facing the TV) of the TV. They are very basic and allow only basic control of the TV's functions.

    In The Box

    • Remote
    • Batteries
    • User Manual
    • Power Cable (not shown)

    Misc
    Power Consumption94 W
    Power Consumption (Max)328 W
    Firmware2.1.6.3

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