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Products
TCL QM851G
TCL QM6K
Tested using Methodology v2.0.1
Updated Aug 12, 2025 01:39 PM
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BestBuy.comTested using Methodology v2.0.1
Updated Aug 20, 2025 01:29 PM
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BestBuy.com
Resolution4k
Native Refresh Rate144Hz
TypeLED
Sub-TypeVA
Dolby VisionYes
Screen FinishGlossy
Resolution4k
Native Refresh Rate144Hz
TypeLED
Sub-TypeVA
Dolby VisionYes
Screen FinishGlossy
Our Verdict
TCL QM851G
TCL QM6K
The TCL QM851G is far better than the TCL QM6K. The QM851G is significantly brighter, delivers better black levels, and offers a wider color gamut, giving it a more vibrant presentation overall. Not only is the QM851G brighter, but it also handles reflections better than the QM6K and provides superior image processing. The QM6K does have the edge in out-of-the-box image accuracy, and its HDR brightness accuracy is also far superior. It can even refresh at up to 288Hz at 1080p, whereas the QM851G tops out at 244Hz at the same resolution. Still, the QM851G's faster pixel transitions make it the better option, even for high-end PC gamers.
Variants
- 65QM851G (65")
- 75QM851G (75")
- 85QM851G (85")
- 98QM851G (98")
- 50QM6K (50")
- 55QM6K (55")
- 65QM6K (65")
- 75QM6K (75")
- 85QM6K (85")
- 98QM6K (98")
Check Price
50"
50"
50QM6K
SEARCH
Amazon.com55"
55"
55QM6K
SEE PRICE
BestBuy.com65"
65QM851G
SEE PRICE
BestBuy.com65"
65QM6K
SEE PRICE
BestBuy.com75"
75QM851G
SEE PRICE
BestBuy.com75"
75QM6K
SEE PRICE
BestBuy.com85"
85QM851G
SEE PRICE
BestBuy.com85"
85QM6K
SEE PRICE
BestBuy.com98"
98QM851G
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Amazon.com98"
98QM6K
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BestBuy.comMain Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
8.2
7.1
HDR Brightness
9.4
6.0
SDR Brightness
9.5
7.5
HDR Color Volume
9.0
6.9
Full Comparison
Brightness
HDR Brightness
9.4
6.0
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
1,472 cd/m²
409 cd/m²
Yellow Skyscraper (~700 cd/m²)
611 cd/m²
276 cd/m²
Landscape Pool (~300 cd/m²)
473 cd/m²
198 cd/m²
Peak 2% Window
2,564 cd/m²
544 cd/m²
Peak 10% Window
3,467 cd/m²
698 cd/m²
Peak 25% Window
3,338 cd/m²
890 cd/m²
Peak 50% Window
1,814 cd/m²
697 cd/m²
Peak 100% Window
967 cd/m²
453 cd/m²
Sustained 2% Window
2,497 cd/m²
468 cd/m²
Sustained 10% Window
3,319 cd/m²
694 cd/m²
Sustained 25% Window
3,253 cd/m²
752 cd/m²
Sustained 50% Window
1,810 cd/m²
691 cd/m²
Sustained 100% Window
965 cd/m²
452 cd/m²
Automatic Brightness Limiting (ABL)
0.060
0.034
HDR Brightness In Game Mode
9.4
6.0
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
1,393 cd/m²
412 cd/m²
Yellow Skyscraper (~700 cd/m²)
625 cd/m²
246 cd/m²
Landscape Pool (~300 cd/m²)
447 cd/m²
232 cd/m²
Peak 2% Window
4,167 cd/m²
468 cd/m²
Peak 10% Window
3,425 cd/m²
684 cd/m²
Peak 25% Window
3,366 cd/m²
758 cd/m²
Peak 50% Window
1,796 cd/m²
693 cd/m²
Peak 100% Window
956 cd/m²
450 cd/m²
Sustained 2% Window
2,384 cd/m²
466 cd/m²
Sustained 10% Window
3,300 cd/m²
677 cd/m²
Sustained 25% Window
3,251 cd/m²
744 cd/m²
Sustained 50% Window
1,792 cd/m²
688 cd/m²
Sustained 100% Window
953 cd/m²
450 cd/m²
Automatic Brightness Limiting (ABL)
0.060
0.033
SDR Brightness
9.5
7.5
Real Scene Peak Brightness
1,108 cd/m²
429 cd/m²
Peak 2% Window
4,043 cd/m²
513 cd/m²
Peak 10% Window
3,355 cd/m²
642 cd/m²
Peak 25% Window
3,291 cd/m²
814 cd/m²
Peak 50% Window
1,767 cd/m²
646 cd/m²
Peak 100% Window
940 cd/m²
418 cd/m²
Sustained 2% Window
2,320 cd/m²
442 cd/m²
Sustained 10% Window
3,238 cd/m²
635 cd/m²
Sustained 25% Window
3,171 cd/m²
696 cd/m²
Sustained 50% Window
1,761 cd/m²
640 cd/m²
Sustained 100% Window
938 cd/m²
418 cd/m²
Automatic Brightness Limiting (ABL)
0.060
0.031
Black Level
Contrast
8.9
8.1
Contrast Picture
Contrast
201,150 : 1
118,059 : 1
Native Contrast
6,515 : 1
6,471 : 1
Lighting Zone Precision
8.5
6.5
Lighting Zone Precision Picture
Lighting Zone Transitions
8.5
7.0
Preferred LD Video, Moving Object
Local Dimming
Yes
Yes
Backlight
Full-Array
Full-Array
Dimming Zone Count Of The Tested TV
2,880
312
Contrast And Dark Details In Game Mode
9.0
7.0
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
7.5
Black Uniformity Picture With Preferred Local Dimming
Std. Dev.
0.154%
0.972%
Native Black Uniformity Picture
Native Std. Dev.
0.569%
0.477%
Color
SDR Color Volume
7.7
6.7
DCI-P3 Gamut Rings
CIELAB DCI-P3 Coverage
90.94%
83.71%
BT.2020 Gamut Rings
CIELAB BT.2020 Coverage
67.01%
57.93%
HDR Color Volume
9.0
6.9
P3 Color Volume ITP Picture
1,000 cd/m² DCI P3 Coverage ITP
85.2%
68.2%
2020 Color Volume ITP Picture
10,000 cd/m² BT.2020 Coverage ITP
54.8%
30.5%
White Luminance
2,513 cd/m²
477 cd/m²
Red Luminance
585 cd/m²
103 cd/m²
Green Luminance
1,885 cd/m²
343 cd/m²
Blue Luminance
189 cd/m²
29 cd/m²
Cyan Luminance
2,075 cd/m²
374 cd/m²
Magenta Luminance
773 cd/m²
119 cd/m²
Yellow Luminance
2,451 cd/m²
415 cd/m²
SDR Pre-Calibration Color Accuracy
7.5
7.6
Pre White Balance Picture
Pre Gamma Curve Picture
Pre Color Picture
White Balance dE 2000
3.36
4.15
Color dE 2000
2.07
2.42
Gamma
2.09
2.23
Color Temperature
6,127 K
6,456 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
9.5
Post White Balance Picture
Post Gamma Curve Picture
Post Color Picture
White Balance dE 2000
0.24
0.26
Color dE 2000
0.82
1.24
Gamma
2.20
2.20
Color Temperature
6,483 K
6,492 K
White Balance Calibration
20 point
20 point
Color Calibration
Yes
Yes
HDR Pre-Calibration Color Accuracy
5.7
8.3
HDR Pre White Balance Picture
HDR Pre Color Picture
White Balance dE ITP
41.45
8.20
Color dE ITP
49.6
6.3
Color Temperature
6,308 K
6,609 K
Picture Mode
Movie
Movie
HDR Post-Calibration Color Accuracy
7.0
9.1
HDR Post White Balance Picture
HDR Post Color Picture
White Balance dE ITP
19.70
5.70
Color dE ITP
8.60
4.90
Color Temperature
6,276 K
6,511 K
Processing
PQ EOTF Tracking
3.9
7.8
PQ EOTF Graph
600 Nit Tracking Delta
0.0313
0.0074
1000 Nit Tracking Delta
0.0314
0.0054
4000 Nit Tracking Delta
0.0314
0.0058
Low-Quality Content Smoothing
8.1
7.0
Low-Quality Content Smoothing Picture
Smoothing
8.5
7.0
Detail Preservation
7.0
7.0
Upscaling: Sharpness Processing
7.5
6.5
Sharpness Picture - 480p
HDR Native Gradient
7.8
6.8
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
6.0
50% Red To 100% Red
10
8.0
100% Black To 50% Green
8.0
6.0
50% Green To 100% Green
8.0
6.0
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
9.0
1080p @ 60Hz
14.1 ms
10.4 ms
1080p @ 60Hz Outside Game Mode
125.0 ms
108.7 ms
1080p @ 120Hz
6.1 ms
5.6 ms
1080p @ Max Refresh Rate
8.0 ms
3.1 ms
4k @ 60Hz
14.1 ms
10.2 ms
4k @ 60Hz @ 4:4:4
15.0 ms
9.9 ms
4k @ 60Hz Outside Game Mode
124.7 ms
108.0 ms
4k @ 60Hz With Interpolation
116.5 ms
128.8 ms
4k @ 120Hz
5.9 ms
5.5 ms
4k @ Max Refresh Rate
5.0 ms
4.7 ms
8k @ 60Hz
N/A
N/A
Supported Resolutions
9.5
9.5
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 Maximum Refresh Rate
240 Hz
288 Hz
4k @ 60Hz
Yes
Yes
4k @ 60Hz @ 4:4:4
Yes
Yes
4k @ 120Hz
Yes
Yes
4k @ 120Hz @ 4:4:4
Yes
Yes
4k Maximum Refresh Rate
144 Hz
144 Hz
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
288 Hz
1080p VRR Minimum
< 20 Hz
< 20 Hz
VRR + Local Dimming
Yes
Yes
CAD In Game Mode @ Max Refresh Rate
7.5
7.1
Pursuit Photo Max Refresh
CAD Heatmap Max Refresh
Transition At Max Refresh
0 to 31
0 to 31
Avg. CAD
173
201
Best 10% CAD
71
101
Worst 10% CAD
303
307
CAD In Game Mode @ 120Hz
6.9
6.9
Pursuit Photo 120Hz
CAD Heatmap 120Hz
Transition At 120Hz
0 to 31
0 to 31
Avg. CAD
200
214
Best 10% CAD
69
102
Worst 10% CAD
482
329
CAD In Game Mode @ 60Hz
7.0
6.3
Pursuit Photo 60Hz
CAD Heatmap 60Hz
Transition 60Hz
0 to 31
0 to 31
Avg. CAD
217
273
Best 10% CAD
71
96
Worst 10% CAD
372
442
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
7.5
Frame Hold Time @ 24 fps
36.2 ms
30.2 ms
Frame Hold Time @ 60 fps
11.2 ms
5.5 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
6.8
Pursuit Photo 60Hz
Response Time Heatmap 60Hz
Transition At 60Hz
0 to 31
0 to 31
First Response Time
5.5 ms
11.2 ms
Total Response Time
10.6 ms
11.5 ms
Worst 10% Response Time
22.9 ms
24.4 ms
Flicker
Backlight chart
Flicker-Free
No
No
PWM Dimming Frequency
30,000 Hz
10,400 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
5.2
Ring Light Picture
Direct Reflections Graph
Peak Direct Reflection Intensity
46.5%
67.5%
Screen Finish
Glossy
Glossy
Ambient Black Level Raise
9.1
9.0
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
0.43 cd/m²
Total Reflected Light
7.8
6.6
Bright Room Off Picture
Ring Picture Total Reflection
Total Reflected Light Intensity
12,962% ⋅ pixel
22,862% ⋅ pixel
Diffraction Artifacts
Yes
Yes
Ambient Color Saturation
8.4
6.9
Bright Room Color Volume Graph
Low-Luminance Colors @ 1000 lx
71.72%
62.27%
Mid-Luminance Colors @ 1000 lx
68.86%
54.81%
High-Luminance Colors @ 1000 lx
59.50%
39.71%
Panel
Viewing Angle
6.2
6.4
Viewing Angle Video
Chroma Graph
Color Washout
23°
32°
Hue Graph
Color Shift
31°
47°
Lightness Graph
Brightness Loss
30°
31°
Black Level Raise
18°
19°
Gamma Shift
18°
16°
Gray Uniformity
7.1
6.6
50% Uniformity Picture
50% Std. Dev.
2.225%
2.416%
50% DSE
0.170%
0.189%
5% Uniformity Picture
5% Std. Dev.
0.670%
1.186%
5% DSE
0.093%
0.098%
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
0
Wi-Fi
Yes (2.4 GHz, 5 GHz)
Yes (2.4 GHz, 5 GHz)
Ethernet Speed
100 Mbps
100 Mbps
Composite In
1 (Adapter Required, Not Incl.)
0
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 300x300
Borders
Borders Picture
Borders
0.31" (0.8 cm)
0.47" (1.2 cm)
Thickness
Thickness Picture
Max Thickness
2.28" (5.8 cm)
2.24" (5.7 cm)
Build Quality
8.5
7.0
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
51 W
Power Consumption (Max)
307 W
187 W
Firmware
V8-T653T02-LF1V085
V8-001202-LF139.001386
Sound Quality
Frequency Response
7.0
6.5
Frequency Response
Low-Frequency Extension
75.51 Hz
100.79 Hz
Std. Dev. @ 70
3.92 dB
2.72 dB
Std. Dev. @ 80
3.60 dB
3.21 dB
Std. Dev. @ Max
4.90 dB
5.33 dB
Max
87.3 dB SPL
85.3 dB SPL
Dynamic Range Compression
4.74 dB
4.27 dB
Digital Room Correction
Yes
Yes
Check Price
50"
50"
50QM6K
SEARCH
Amazon.com55"
55"
55QM6K
SEE PRICE
BestBuy.com65"
65QM851G
SEE PRICE
BestBuy.com65"
65QM6K
SEE PRICE
BestBuy.com75"
75QM851G
SEE PRICE
BestBuy.com75"
75QM6K
SEE PRICE
BestBuy.com85"
85QM851G
SEE PRICE
BestBuy.com85"
85QM6K
SEE PRICE
BestBuy.com98"
98QM851G
SEE PRICE
Amazon.com98"
98QM6K
SEE PRICE
BestBuy.com
TCL QM851G
TCL QM6K
Comments
TCL QM851G vs TCL QM6K: Main Discussion
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