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- Table of Contents
- Top
- Main Differences
- Design
- Picture Quality
- Motion
- Inputs
- Sound Quality
- Smart Features
- Comments
TCL QM8/QM850G QLED vs TCL QM8/QM851G QLED
Side-by-Side Comparison
Products
TCL QM8/QM850G QLED
TCL QM8/QM851G QLED
Tested using Methodology v1.11
Updated Jan 23, 2025 08:22 PM
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Amazon.comTested using Methodology v1.11
Updated Jan 23, 2025 05:12 PM
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Amazon.com
Resolution4k
TypeLED
Sub-TypeVA
Resolution4k
TypeLED
Sub-TypeVA
Variants
- 65QM850G (65")
- 75QM850G (75")
- 85QM850G (85")
- 98QM850G (98")
- 65QM851G (65")
- 75QM851G (75")
- 85QM851G (85")
- 98QM851G (98")
Our Verdict
TCL QM8/QM850G QLED
TCL QM8/QM851G QLED
The TCL QM8/QM851G QLED is a bit better than the TCL QM8/QM850G QLED. The QM851G has better contrast, so it displays deeper blacks in a dark room, with a bit less blooming. The QM851G also gets brighter in HDR, so very bright highlights stand out a bit more on it. Additionally, the QM851G has better pre-calibration SDR accuracy, slightly better upscaling, and its color volume is a bit better. However, the QM850G has better PQ EOTF tracking, so it displays a more accurate image in HDR.
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65"
65QM850G
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65QM851G
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75QM850G
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75QM851G
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85QM850G
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85QM851G
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98QM850G
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98QM851G
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Threshold
Mixed Usage
8.4
8.5
Full Comparison
Design
Style
Design Picture
Curved
No
No
Accelerated Longevity Test
Uniformity Pictures
Longevity Graph
Stand
Stand Picture
Back
Back Picture
Wall Mount
VESA 300x400
VESA 400x400
Borders
Borders Picture
Borders
0.39" (1.0 cm)
0.31" (0.8 cm)
Thickness
Thickness Picture
Max Thickness
1.93" (4.9 cm)
2.28" (5.8 cm)
Build Quality
8.5
8.5
Build quality picture
Picture Quality
Contrast
9.2
9.4
Contrast Picture
Contrast
114,057 : 1
161,440 : 1
Native Contrast
5,533 : 1
7,638 : 1
Blooming
8.0
8.5
Blooming Photo
Lighting Zone Transitions
8.0
8.5
Preferred LD Video, Moving Object
Local Dimming
Yes
Yes
Backlight
Full-Array
Full-Array
Dimming Zones Count Of Tested TV
1,080
2,880
Contrast And Dark Details In Game Mode
9.0
9.0
Blooming Photo In Game Mode
Preferred LD Video, Moving Object In Game Mode
Game Transitions With VRR And Preferred LD
HDR Brightness
9.4
9.7
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
1,303 cd/m²
1,472 cd/m²
Yellow Skyscraper (~700 cd/m²)
514 cd/m²
611 cd/m²
Landscape Pool (~300 cd/m²)
522 cd/m²
473 cd/m²
Peak 2% Window
1,626 cd/m²
2,564 cd/m²
Peak 10% Window
2,005 cd/m²
3,467 cd/m²
Peak 25% Window
1,716 cd/m²
3,338 cd/m²
Peak 50% Window
1,495 cd/m²
1,814 cd/m²
Peak 100% Window
863 cd/m²
967 cd/m²
Sustained 2% Window
1,609 cd/m²
2,497 cd/m²
Sustained 10% Window
1,915 cd/m²
3,319 cd/m²
Sustained 25% Window
1,689 cd/m²
3,253 cd/m²
Sustained 50% Window
1,485 cd/m²
1,810 cd/m²
Sustained 100% Window
862 cd/m²
965 cd/m²
Automatic Brightness Limiting (ABL)
0.038
0.060
HDR Brightness In Game Mode
9.4
9.7
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
1,245 cd/m²
1,393 cd/m²
Yellow Skyscraper (~700 cd/m²)
512 cd/m²
625 cd/m²
Landscape Pool (~300 cd/m²)
534 cd/m²
447 cd/m²
Peak 2% Window
1,482 cd/m²
4,167 cd/m²
Peak 10% Window
1,977 cd/m²
3,425 cd/m²
Peak 25% Window
1,788 cd/m²
3,366 cd/m²
Peak 50% Window
1,534 cd/m²
1,796 cd/m²
Peak 100% Window
866 cd/m²
956 cd/m²
Sustained 2% Window
1,471 cd/m²
2,384 cd/m²
Sustained 10% Window
1,884 cd/m²
3,300 cd/m²
Sustained 25% Window
1,753 cd/m²
3,251 cd/m²
Sustained 50% Window
1,522 cd/m²
1,792 cd/m²
Sustained 100% Window
864 cd/m²
953 cd/m²
Automatic Brightness Limiting (ABL)
0.038
0.060
PQ EOTF Tracking
7.5
6.8
PQ EOTF Graph
600 Nit Tracking Delta
0.0159
0.0313
1000 Nit Tracking Delta
0.0186
0.0314
4000 Nit Tracking Delta
0.0177
0.0314
SDR Brightness
9.4
9.4
Real Scene Peak Brightness
1,081 cd/m²
1,108 cd/m²
Peak 2% Window
2,868 cd/m²
4,043 cd/m²
Peak 10% Window
2,076 cd/m²
3,355 cd/m²
Peak 25% Window
2,573 cd/m²
3,291 cd/m²
Peak 50% Window
1,538 cd/m²
1,767 cd/m²
Peak 100% Window
868 cd/m²
940 cd/m²
Sustained 2% Window
1,709 cd/m²
2,320 cd/m²
Sustained 10% Window
2,015 cd/m²
3,238 cd/m²
Sustained 25% Window
1,824 cd/m²
3,171 cd/m²
Sustained 50% Window
1,530 cd/m²
1,761 cd/m²
Sustained 100% Window
865 cd/m²
938 cd/m²
Automatic Brightness Limiting (ABL)
0.041
0.060
Color Gamut
8.7
8.7
Wide Color Gamut
Yes
Yes
Color Gamut DCI-P3 Picture
DCI P3 xy
94.59%
94.71%
DCI P3 uv
97.31%
97.13%
Color Gamut Rec.2020 Picture
Rec 2020 xy
75.81%
74.53%
Rec 2020 uv
80.57%
80.64%
Color Volume
9.0
9.2
P3 Color Volume ITP Picture
1,000 cd/m² DCI P3 Coverage ITP
83.3%
85.2%
2020 Color Volume ITP Picture
10,000 cd/m² Rec 2020 Coverage ITP
49.4%
54.8%
White Luminance
1,694 cd/m²
2,513 cd/m²
Red Luminance
404 cd/m²
585 cd/m²
Green Luminance
1,250 cd/m²
1,885 cd/m²
Blue Luminance
128 cd/m²
189 cd/m²
Cyan Luminance
1,378 cd/m²
2,075 cd/m²
Magenta Luminance
532 cd/m²
773 cd/m²
Yellow Luminance
1,660 cd/m²
2,451 cd/m²
Pre Calibration
6.8
7.8
Pre White Balance Picture
Pre Gamma Curve Picture
Pre Color Picture
White Balance dE
4.74
3.36
Color dE
2.18
2.07
Gamma
2.24
2.09
Color Temperature
5,961 K
6,127 K
Picture Mode
Movie
Movie
Color Temp Setting
Warm
Warm -5
Gamma Setting
2.2
2.2
Post Calibration
9.4
9.6
Post White Balance Picture
Post Gamma Curve Picture
Post Color Picture
White Balance dE
0.59
0.24
Color dE
1.08
0.82
Gamma
2.15
2.20
Color Temperature
6,470 K
6,483 K
White Balance Calibration
20 point
20 point
Color Calibration
Yes
Yes
Gray Uniformity
7.6
7.9
50% Uniformity Picture
50% Std. Dev.
1.574%
2.225%
50% DSE
0.199%
0.170%
5% Uniformity Picture
5% Std. Dev.
0.335%
0.670%
5% DSE
0.110%
0.093%
Black Uniformity
9.6
9.8
Black Uniformity Picture With Preferred Local Dimming
Std. Dev.
0.185%
0.154%
Native Black Uniformity Picture
Native Std. Dev.
0.821%
0.569%
Viewing Angle
5.5
5.4
Viewing Angle Video
Chroma Graph
Color Washout
24°
23°
Hue Graph
Color Shift
31°
31°
Lightness Graph
Brightness Loss
32°
30°
Black Level Raise
19°
18°
Gamma Shift
18°
18°
Reflections
9.1
9.0
Reflections Picture
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Glossy
Glossy
Total Reflections
1.8%
1.9%
Indirect Reflections
0.4%
0.4%
Calculated Direct Reflections
1.4%
1.5%
HDR Native Gradient
8.0
7.8
HDR Gradient Picture
100% Black to 50% Gray
6.0
6.0
50% Gray to 100% White
8.0
6.0
100% Black to 50% Red
6.0
8.0
50% Red to 100% Red
8.0
10
100% Black to 50% Green
10
8.0
50% Green to 100% Green
8.0
8.0
100% Black to 50% Blue
10
8.0
50% Blue to 100% Blue
8.0
8.0
Low-Quality Content Smoothing
8.1
8.1
Low-Quality Content Smoothing Picture
Smoothing
9.0
8.5
Detail Preservation
6.0
7.0
Upscaling: Sharpness Processing
7.0
7.5
Sharpness Picture - 480p
Pixels
Pixels Picture
Subpixel Layout
BGR
BGR
Type
LED
LED
Sub-Type
VA
VA
Motion
Response Time
8.5
8.6
Motion Blur Picture
Response Time Chart
80% Response Time
4.0 ms
3.3 ms
100% Response Time
8.9 ms
9.7 ms
Flicker-Free
9.0
9.0
Backlight chart
Flicker-Free
No
No
PWM Dimming Frequency
4,000 Hz
30,000 Hz
Black Frame Insertion (BFI)
BFI Picture
BFI Frequency Picture
Optional BFI
Yes
Yes
Min Flicker For 60 fps
60 Hz
60 Hz
60Hz For 60 fps
Yes
Yes
120Hz For 120 fps
Yes
Yes
Min Flicker for 60 fps in Game Mode
60 Hz
60 Hz
Motion Interpolation
Motion Interpolation (30 fps) Picture
Motion Interpolation (30 fps)
Yes
Yes
Motion Interpolation (60 fps) Picture
Motion Interpolation (60 fps)
Yes
Yes
Stutter
6.5
6.7
Frame Hold Time @ 24 fps
32.8 ms
32.0 ms
Frame Hold Time @ 60 fps
7.8 ms
7.0 ms
24p Judder
10
10
Judder-Free 24p
Yes
Yes
Judder-Free 24p via 60p
Yes
Yes
Judder-Free 24p via 60i
Yes
Yes
Judder-Free 24p via Native Apps
Yes
Yes
Variable Refresh Rate
9.6
9.6
Native Refresh Rate
144 Hz
144 Hz
Variable Refresh Rate
Yes
Yes
HDMI Forum VRR
Yes
Yes
FreeSync
Yes
Yes
G-SYNC Compatible
Yes
Yes
4k VRR Maximum
144 Hz
144 Hz
4k VRR Minimum
< 20 Hz
< 20 Hz
1080p VRR Maximum
240 Hz
240 Hz
1080p VRR Minimum
< 20 Hz
< 20 Hz
1440p VRR Maximum
144 Hz
144 Hz
1440p VRR Minimum
< 20 Hz
< 20 Hz
VRR + Local Dimming
Yes
Yes
Inputs
Input Lag
9.4
9.5
1080p @ 60Hz
14.3 ms
14.1 ms
1080p @ 60Hz Outside Game Mode
127.6 ms
125.0 ms
1080p @ 120Hz
6.1 ms
6.1 ms
1080p @ 144Hz
14.9 ms
4.9 ms
1440p @ 60Hz
17.6 ms
14.0 ms
1440p @ 120Hz
9.7 ms
6.0 ms
1440p @ 144Hz
16.3 ms
5.1 ms
4k @ 60Hz
14.2 ms
14.1 ms
4k @ 60Hz + 10-Bit HDR
14.2 ms
14.1 ms
4k @ 60Hz @ 4:4:4
26.4 ms
15.0 ms
4k @ 60Hz Outside Game Mode
127.7 ms
124.7 ms
4k @ 60Hz With Interpolation
121.2 ms
116.5 ms
4k @ 120Hz
6.3 ms
5.9 ms
4k @ 144Hz
15.7 ms
5.0 ms
8k @ 60Hz
N/A
N/A
Supported Resolutions
9.3
9.6
Resolution
4k
4k
480p @ 59.94Hz (Widescreen)
Yes
Yes
720p @ 59.94Hz
Yes
Yes
1080p @ 60Hz @ 4:4:4
Yes
Yes
1080p @ 120Hz
Yes
Yes
1080p @ 144Hz
Yes
Yes
1440p @ 60Hz
Yes (forced resolution required)
Yes (forced resolution required)
1440p @ 120Hz
Yes
Yes
1440p @ 144Hz
Yes
Yes (forced resolution required)
4k @ 60Hz
Yes
Yes
4k @ 60Hz @ 4:4:4
Yes
Yes
4k @ 120Hz
Yes
Yes
4k @ 120Hz @ 4:4:4
No
Yes
4k @ 144Hz
Yes
Yes
8k @ 30Hz or 24Hz
No
No
8k @ 60Hz
No
No
PS5 Compatibility
PS5 Screenshot
Auto Low Latency Mode (ALLM)
Yes
Yes
4k @ 120Hz
Yes
Yes
1440p @ 120Hz
Yes
Yes
1080p @ 120Hz
Yes
Yes
HDR
Yes
Yes
VRR
Yes
Yes
Xbox Series X|S Compatibility
Xbox Series X Screenshot
Auto Low Latency Mode (ALLM)
Yes
Yes
4k @ 120Hz
Yes
Yes
1440p @ 120Hz
Yes
Yes
1080p @ 120Hz
Yes
Yes
HDR
Yes
Yes
VRR
Yes
Yes
Inputs Specifications
HDR10
Yes
Yes
HDR10+
Yes
Yes
Dolby Vision
Yes
Yes
HLG
Yes
Yes
HDMI 2.0 Full Bandwidth
Yes (HDMI 1,2,3,4)
Yes (HDMI 1,2,3,4)
HDMI 2.1 Class Bandwidth
Yes (HDMI 1,2)
Yes (HDMI 1,2)
CEC
Yes
Yes
HDCP 2.2
Yes (HDMI 1,2,3,4)
Yes (HDMI 1,2,3,4)
ATSC Tuner
1.0
3.0 (NEXTGEN TV)
USB 3.0
No
Yes (1)
Variable Analog Audio Out
Yes
Yes
Wi-Fi Support
Yes (2.4 GHz, 5 GHz)
Yes (2.4 GHz, 5 GHz, 6 GHz)
Input Photos
Side Inputs Picture
Rear Inputs Picture
Total Inputs
HDMI
4
4
USB
1
3
Digital Optical Audio Out
1
1
Analog Audio Out 3.5mm
1
1
Analog Audio Out RCA
0
0
Component In
0
0
Composite In
1 (adapter required, not incl.)
1 (adapter required, not incl.)
Tuner (Cable/Ant)
1
1
Ethernet
1
1
DisplayPort
0
0
IR In
0
0
Audio Passthrough
ARC/eARC Port
eARC
eARC
eARC: Dolby Atmos Over Dolby Digital Plus
Yes
Yes
eARC: Dolby Digital Plus 7.1
Yes
Yes
eARC: LPCM 7.1 Over Dolby MAT
Yes
Yes
eARC: Dolby TrueHD 7.1
Yes
Yes
eARC: DTS:X Over DTS-HD MA
Yes
Yes
eARC: DTS-HD Master Audio 7.1
Yes
Yes
eARC: LPCM Channels (Bitstream)
2.0
7.1
ARC: Dolby Digital 5.1
Yes
Yes
ARC: DTS 5.1
Yes
Yes
Optical: Dolby Digital 5.1
Yes
Yes
Optical: DTS 5.1
Yes
Yes
Sound Quality
Frequency Response
7.0
7.0
Frequency Response
Low-Frequency Extension
89.80 Hz
75.51 Hz
Std. Dev. @ 70
4.74 dB
3.92 dB
Std. Dev. @ 80
4.67 dB
3.60 dB
Std. Dev. @ Max
5.09 dB
4.90 dB
Max
92.1 dB SPL
87.3 dB SPL
Dynamic Range Compression
2.43 dB
4.74 dB
Distortion
6.6
6.5
Total Harmonic Distortion
Weighted THD @ 80
0.128
0.492
Weighted THD @ Max
0.793
27.890
IMD @ 80
8.67%
0.95%
IMD @ Max
8.42%
2.69%
Smart Features
Interface
8.0
8.0
Smart TV Picture
Smart OS
Google TV
Google TV
Version
11
12
Ease of Use
Average
Average
Smoothness
Very Smooth
Very Smooth
Time Taken to Select YouTube
1 s
1 s
Time Taken to Change Backlight
2 s
2 s
Advanced Options
Many
Many
Ad-Free
0.0
0.0
Ads Picture
Ads
Yes
Yes
Opt-out
No
No
Suggested Content in Home
Yes
Yes
Opt-out of Suggested Content
No
No
Apps and Features
9.0
9.0
Apps Picture
App Selection
Great
Great
App Smoothness
Very Smooth
Very Smooth
Cast Capable
Yes
Yes
USB Drive Playback
Yes
Yes
USB Drive HDR Playback
Yes
Yes
HDR in Netflix
Yes
Yes
HDR in YouTube
Yes
Yes
Remote
8.5
8.5
Remote Picture
Size
Medium
Medium
Voice Control
Many Features
Many Features
CEC Menu Control
Yes
Yes
Other Smart Features
No
No
Remote App
Android TV
Android TV
TV Controls
Controls Picture
In The Box
In The Box Picture
Misc
Power Consumption
54 W
66 W
Power Consumption (Max)
299 W
307 W
Firmware
B8-T615T02-LF1V295.000844
V8-T653T02-LF1V085
Check Price
65"
65QM850G
Searching
Finding store65"
65QM851G
Searching
Finding store75"
75QM850G
Searching
Finding store75"
75QM851G
Searching
Finding store85"
85QM850G
Searching
Finding store85"
85QM851G
Searching
Finding store98"
98QM850G
Searching
Finding store98"
98QM851G
Searching
Finding store
TCL QM8/QM850G QLED
TCL QM8/QM851G QLED
Comments
TCL QM8/QM850G QLED vs TCL QM8/QM851G QLED: Main Discussion
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