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- Table of Contents
- Top
- Main Differences
- Brightness
- Black Level
- Color
- Processing
- Game Mode Responsiveness
- Motion Handling
- Reflections
- Panel
- Inputs
- Design
- Smart Features
- Sound Quality
- Comments
TCL QM8/QM851G QLED vs TCL QM7/QM751G QLED
Side-by-Side Comparison
Products
TCL QM8/QM851G QLED
TCL QM7/QM751G QLED
Tested using Methodology v2.0
Updated Apr 14, 2025 03:16 PM
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Amazon.comTested using Methodology v2.0
Updated Apr 21, 2025 01:26 PM
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Resolution4k
Native Refresh Rate144Hz
TypeLED
Sub-TypeVA
Dolby VisionYes
Screen FinishGlossy
Resolution4k
Native Refresh Rate144Hz
TypeLED
Sub-TypeVA
Dolby VisionYes
Screen FinishGlossy
Variants
- 65QM851G (65")
- 75QM851G (75")
- 85QM851G (85")
- 98QM851G (98")
- 55QM751G (55")
- 65QM751G (65")
- 75QM751G (75")
- 85QM751G (85")
- 98QM751G (98")
Our Verdict
TCL QM8/QM851G QLED
TCL QM7/QM751G QLED
The TCL QM8/QM851G QLED is better than the TCL QM7/QM751G QLED. With a few exceptions, the QM8 does most things better than the QM7. The QM8 is noticeably brighter in HDR and SDR, has better contrast, and is more accurate in SDR prior to calibration. It also has much better reflection handling than the QM7, making it a far better option if you like to watch TV in extremely bright rooms. Still, the QM7 is more accurate in HDR and has better color volume in SDR. But, overall, the QM8 is a noticeable upgrade over the QM7.
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55"
55"
55QM751G
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65QM851G
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65QM751G
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75QM851G
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75QM751G
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85QM851G
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85QM751G
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98QM851G
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98QM751G
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Finding storeMain Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
8.2
7.8
HDR Brightness
9.4
8.1
SDR Brightness
9.5
8.6
Full Comparison
Brightness
HDR Brightness
9.4
8.1
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
1,472 cd/m²
828 cd/m²
Yellow Skyscraper (~700 cd/m²)
611 cd/m²
397 cd/m²
Landscape Pool (~300 cd/m²)
473 cd/m²
299 cd/m²
Peak 2% Window
2,564 cd/m²
1,315 cd/m²
Peak 10% Window
3,467 cd/m²
1,555 cd/m²
Peak 25% Window
3,338 cd/m²
1,449 cd/m²
Peak 50% Window
1,814 cd/m²
899 cd/m²
Peak 100% Window
967 cd/m²
564 cd/m²
Sustained 2% Window
2,497 cd/m²
1,115 cd/m²
Sustained 10% Window
3,319 cd/m²
1,527 cd/m²
Sustained 25% Window
3,253 cd/m²
1,428 cd/m²
Sustained 50% Window
1,810 cd/m²
897 cd/m²
Sustained 100% Window
965 cd/m²
564 cd/m²
Automatic Brightness Limiting (ABL)
0.060
0.052
HDR Brightness In Game Mode
9.4
8.0
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
1,393 cd/m²
796 cd/m²
Yellow Skyscraper (~700 cd/m²)
625 cd/m²
400 cd/m²
Landscape Pool (~300 cd/m²)
447 cd/m²
293 cd/m²
Peak 2% Window
4,167 cd/m²
1,297 cd/m²
Peak 10% Window
3,425 cd/m²
1,466 cd/m²
Peak 25% Window
3,366 cd/m²
1,378 cd/m²
Peak 50% Window
1,796 cd/m²
862 cd/m²
Peak 100% Window
956 cd/m²
543 cd/m²
Sustained 2% Window
2,384 cd/m²
1,098 cd/m²
Sustained 10% Window
3,300 cd/m²
1,443 cd/m²
Sustained 25% Window
3,251 cd/m²
1,364 cd/m²
Sustained 50% Window
1,792 cd/m²
860 cd/m²
Sustained 100% Window
953 cd/m²
542 cd/m²
Automatic Brightness Limiting (ABL)
0.060
0.052
SDR Brightness
9.5
8.6
Real Scene Peak Brightness
1,108 cd/m²
604 cd/m²
Peak 2% Window
4,043 cd/m²
1,222 cd/m²
Peak 10% Window
3,355 cd/m²
1,509 cd/m²
Peak 25% Window
3,291 cd/m²
1,406 cd/m²
Peak 50% Window
1,767 cd/m²
844 cd/m²
Peak 100% Window
940 cd/m²
532 cd/m²
Sustained 2% Window
2,320 cd/m²
1,031 cd/m²
Sustained 10% Window
3,238 cd/m²
1,487 cd/m²
Sustained 25% Window
3,171 cd/m²
1,329 cd/m²
Sustained 50% Window
1,761 cd/m²
840 cd/m²
Sustained 100% Window
938 cd/m²
531 cd/m²
Automatic Brightness Limiting (ABL)
0.060
0.053
Black Level
Contrast
8.9
8.2
Contrast Picture
Contrast
201,150 : 1
135,500 : 1
Native Contrast
6,515 : 1
5,651 : 1
Lighting Zone Precision
8.5
7.5
Lighting Zone Precision Picture
Lighting Zone Transitions
8.5
8.0
Preferred LD Video, Moving Object
Local Dimming
Yes
Yes
Backlight
Full-Array
Full-Array
Dimming Zone Count Of The Tested TV
2,880
1,248
Contrast And Dark Details In Game Mode
9.0
8.0
Lighting Zone Precision Photo In Game Mode
Preferred LD Video, Moving Object In Game Mode
Game Transitions With VRR And Preferred LD
Black Uniformity
8.9
9.5
Black Uniformity Picture With Preferred Local Dimming
Std. Dev.
0.154%
0.269%
Native Black Uniformity Picture
Native Std. Dev.
0.569%
0.420%
Color
SDR Color Volume
7.7
8.0
DCI-P3 Gamut Rings
CIELAB DCI-P3 Coverage
90.94%
92.27%
BT.2020 Gamut Rings
CIELAB BT.2020 Coverage
67.01%
70.17%
HDR Color Volume
9.0
8.5
P3 Color Volume ITP Picture
1,000 cd/m² DCI P3 Coverage ITP
85.2%
82.8%
2020 Color Volume ITP Picture
10,000 cd/m² BT.2020 Coverage ITP
54.8%
44.8%
White Luminance
2,513 cd/m²
1,199 cd/m²
Red Luminance
585 cd/m²
291 cd/m²
Green Luminance
1,885 cd/m²
826 cd/m²
Blue Luminance
189 cd/m²
91 cd/m²
Cyan Luminance
2,075 cd/m²
920 cd/m²
Magenta Luminance
773 cd/m²
383 cd/m²
Yellow Luminance
2,451 cd/m²
1,117 cd/m²
SDR Pre-Calibration Color Accuracy
7.5
5.2
Pre White Balance Picture
Pre Gamma Curve Picture
Pre Color Picture
White Balance dE 2000
3.36
6.27
Color dE 2000
2.07
3.22
Gamma
2.09
2.20
Color Temperature
6,127 K
5,794 K
Picture Mode
Movie
Movie
Color Temp Setting
Warm -5
Warm -5
Gamma Setting
2.2
2.2
SDR Post-Calibration Color Accuracy
9.6
9.7
Post White Balance Picture
Post Gamma Curve Picture
Post Color Picture
White Balance dE 2000
0.24
0.40
Color dE 2000
0.82
0.48
Gamma
2.20
2.21
Color Temperature
6,483 K
6,470 K
White Balance Calibration
20 point
20 point
Color Calibration
Yes
Yes
HDR Pre-Calibration Color Accuracy
5.7
7.0
HDR Pre White Balance Picture
HDR Pre Color Picture
White Balance dE ITP
41.45
14.66
Color dE ITP
49.6
19.2
Color Temperature
6,308 K
6,534 K
Picture Mode
Movie
Movie
HDR Post-Calibration Color Accuracy
7.0
9.2
HDR Post White Balance Picture
HDR Post Color Picture
White Balance dE ITP
19.70
2.86
Color dE ITP
8.60
4.70
Color Temperature
6,276 K
6,358 K
Processing
PQ EOTF Tracking
3.9
5.3
PQ EOTF Graph
600 Nit Tracking Delta
0.0313
0.0156
1000 Nit Tracking Delta
0.0314
0.0155
4000 Nit Tracking Delta
0.0314
0.0156
Low-Quality Content Smoothing
8.1
8.1
Low-Quality Content Smoothing Picture
Smoothing
8.5
8.5
Detail Preservation
7.0
7.0
Upscaling: Sharpness Processing
7.5
7.5
Sharpness Picture - 480p
HDR Native Gradient
7.8
7.5
HDR Gradient Picture
100% Black To 50% Gray
6.0
6.0
50% Gray To 100% White
6.0
6.0
100% Black To 50% Red
8.0
8.0
50% Red To 100% Red
10
8.0
100% Black To 50% Green
8.0
8.0
50% Green To 100% Green
8.0
8.0
100% Black To 50% Blue
8.0
8.0
50% Blue To 100% Blue
8.0
8.0
Game Mode Responsiveness
Input Lag
8.4
8.3
1080p @ 60Hz
14.1 ms
14.3 ms
1080p @ 60Hz Outside Game Mode
125.0 ms
125.2 ms
1080p @ 120Hz
6.1 ms
6.4 ms
1080p @ Max Refresh Rate
8.0 ms
8.1 ms
4k @ 60Hz
14.1 ms
14.4 ms
4k @ 60Hz @ 4:4:4
15.0 ms
14.8 ms
4k @ 60Hz Outside Game Mode
124.7 ms
124.9 ms
4k @ 60Hz With Interpolation
116.5 ms
116.9 ms
4k @ 120Hz
5.9 ms
6.0 ms
4k @ Max Refresh Rate
5.0 ms
5.2 ms
8k @ 60Hz
N/A
N/A
Supported Resolutions
9.7
9.7
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
4k @ 60Hz
Yes
Yes
4k @ 60Hz @ 4:4:4
Yes
Yes
4k @ 120Hz
Yes
Yes
4k @ 120Hz @ 4:4:4
Yes
Yes
4k @ 144Hz
Yes
Yes
8k @ 30Hz Or 24Hz
No
No
8k @ 60Hz
No
No
Variable Refresh Rate
8.8
8.8
Native Refresh Rate
144Hz
144Hz
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
VRR + Local Dimming
Yes
Yes
CAD In Game Mode @ Max Refresh Rate
7.5
6.7
Pursuit Photo Max Refresh
CAD Heatmap Max Refresh
Transition At Max Refresh
0 to 31
0 to 31
Avg. CAD
173
225
Best 10% CAD
71
121
Worst 10% CAD
303
357
CAD In Game Mode @ 120Hz
6.9
6.8
Pursuit Photo 120Hz
CAD Heatmap 120Hz
Transition At 120Hz
0 to 31
0 to 31
Avg. CAD
200
212
Best 10% CAD
69
86
Worst 10% CAD
482
460
CAD In Game Mode @ 60Hz
7.0
6.8
Pursuit Photo 60Hz
CAD Heatmap 60Hz
Transition 60Hz
0 to 31
0 to 31
Avg. CAD
217
212
Best 10% CAD
71
85
Worst 10% CAD
372
457
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
Motion Handling
Stutter
6.1
6.4
Frame Hold Time @ 24 fps
36.2 ms
35.4 ms
Frame Hold Time @ 60 fps
11.2 ms
10.4 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
Response Time
8.1
8.0
Pursuit Photo 60Hz
Response Time Heatmap 60Hz
Transition At 60Hz
0 to 31
0 to 31
First Response Time
5.5 ms
6.3 ms
Total Response Time
10.6 ms
10.0 ms
Worst 10% Response Time
22.9 ms
21.8 ms
Flicker
Backlight chart
Flicker-Free
No
No
PWM Dimming Frequency
30,000 Hz
10,000 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
Reflections
Direct Reflections
6.3
5.3
Ring Light Picture
Direct Reflections Graph
Peak Direct Reflection Intensity
46.5%
67.1%
Screen Finish
Glossy
Glossy
Ambient Black Level Raise
9.1
9.1
Black Level Raise Picture
Bright Room Black Level Raise Graph
Black Luminance @ 0 lx
0.00 cd/m²
0.00 cd/m²
Black Luminance @ 1000 lx
0.38 cd/m²
0.38 cd/m²
Total Reflected Light
7.8
5.9
Bright Room Off Picture
Ring Picture Total Reflection
Total Reflected Light Intensity
12,962% ⋅ pixel
27,092% ⋅ pixel
Diffraction Artifacts
Yes
Yes
Ambient Color Saturation
8.4
8.5
Bright Room Color Volume Graph
Low-Luminance Colors @ 1000 lx
71.72%
71.10%
Mid-Luminance Colors @ 1000 lx
68.86%
71.77%
High-Luminance Colors @ 1000 lx
59.50%
67.56%
Panel
Viewing Angle
6.2
6.7
Viewing Angle Video
Chroma Graph
Color Washout
23°
23°
Hue Graph
Color Shift
31°
65°
Lightness Graph
Brightness Loss
30°
30°
Black Level Raise
18°
18°
Gamma Shift
18°
20°
Gray Uniformity
7.1
6.5
50% Uniformity Picture
50% Std. Dev.
2.225%
3.346%
50% DSE
0.170%
0.182%
5% Uniformity Picture
5% Std. Dev.
0.670%
1.050%
5% DSE
0.093%
0.084%
Panel Technology
Spectral Power Distribution
Pixels Picture
Type
LED
LED
Sub-Type
VA
VA
Subpixel Layout
BGR
BGR
Inputs
Input Specifications
Side Inputs Picture
Rear Inputs Picture
HDMI
4 (2x HDMI 2.0, 2x HDMI 2.1)
4 (2x HDMI 2.0, 2x HDMI 2.1)
HDMI 2.1 Rated Speed
48 Gbps
48 Gbps
ATSC Tuner
3.0 (NEXTGEN TV)
1.0
USB Ports
3
2
USB 3.0
Yes (1)
Yes (1)
Audio Out 3.5mm
1
1
Wi-Fi
Yes (2.4 GHz, 5 GHz, 6 GHz)
Yes (2.4 GHz, 5 GHz)
Ethernet Speed
100 Mbps
100 Mbps
Composite In
1 (Adapter Required, Not Incl.)
1 (Adapter Required, Not Incl.)
Digital Optical Audio Out
1
1
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)
7.1
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
HDR Format Support
HDR10
Yes
Yes
HDR10+
Yes
Yes
Dolby Vision
Yes
Yes
HLG
Yes
Yes
Design
Style
Design Picture
Curved
No
No
Stand
Stand Picture
Back
Back Picture
Wall Mount
VESA 400x400
VESA 400x400
Borders
Borders Picture
Borders
0.31" (0.8 cm)
0.31" (0.8 cm)
Thickness
Thickness Picture
Max Thickness
2.28" (5.8 cm)
3.11" (7.9 cm)
Build Quality
8.5
8.0
Build quality picture
Smart Features
Interface
Smart TV Picture
Smart OS
Google TV
Google TV
Version
12
12
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
Remote
Remote Picture
Voice Control
Yes
Yes
TV Controls
Controls Picture
Mute Switch
Yes
Yes
In The Box
In The Box Picture
Misc
Power Consumption
66 W
70 W
Power Consumption (Max)
307 W
309 W
Firmware
V8-T653T02-LF1V085
V8-T653T02-LF1V097
Sound Quality
Frequency Response
7.0
6.6
Frequency Response
Low-Frequency Extension
75.51 Hz
119.87 Hz
Std. Dev. @ 70
3.92 dB
3.63 dB
Std. Dev. @ 80
3.60 dB
3.64 dB
Std. Dev. @ Max
4.90 dB
4.40 dB
Max
87.3 dB SPL
85.9 dB SPL
Dynamic Range Compression
4.74 dB
1.69 dB
Digital Room Correction
Yes
No
Check Price
55"
55"
55QM751G
Searching
Finding store65"
65QM851G
Searching
Finding store65"
65QM751G
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Finding store75"
75QM851G
Searching
Finding store75"
75QM751G
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Finding store85"
85QM851G
Searching
Finding store85"
85QM751G
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Finding store98"
98QM851G
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Finding store98"
98QM751G
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TCL QM8/QM851G QLED
TCL QM7/QM751G QLED
Comments
TCL QM8/QM851G QLED vs TCL QM7/QM751G QLED: Main Discussion
What do you think of these products? Let us know below.
Looking for a personalized buying advice from the RTINGS.com experts? Insiders have direct access to buying advice on our insider forum.
The product has won our suggestion poll, so we’ll buy and test it soon. Follow this thread for updates!
I’d like to see three things in the review:
-decibel levels of the auto-emptying clean base, I’ve heard people claim it reaches over 85db, which would be unacceptable.
-one thing that is sorely lacking in all rtings reviews are any mentions of privacy. Vacuum robots have the potential to gather lots of data and the less private ones like Roborock happily share your data with all sorts of companies like Facebook and Tencent. Roomba supposedly shares your floor plan with Google. Their privacy policy is bad too, e.g. iRobot may collect “Demographic and lifestyle information, such as your age, date of birth, gender, salary or other income, leisure and other interests, number of children and number of pets, information about your home environment”. Rtings should include some sort of product privacy rating in their reviews so people can make informed choices.
-whether or not the robot can be used without connecting to wifi and downloading an app would be nice to know. If you buy a robot vacuum for someone elderly you can usually forget about them using an app.
Early access to our full test results is now available for Insiders! Become an insider to check it out here.