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Products
Samsung QN900A 8K
TCL 6 Series/R648 2021 8k QLED
Tested using Methodology v1.6
Updated Sep 25, 2025 02:19 PM
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Amazon.comTested using Methodology v1.11
Updated Sep 24, 2025 06:36 PM
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Amazon.com
Resolution8k
TypeLED
Sub-TypeVA
Resolution8k
TypeLED
Sub-TypeVA
Our Verdict
Samsung QN900A 8K
TCL 6 Series/R648 2021 8k QLED
The Samsung QN900A 8K and the TCL 6 Series/R648 2021 8k QLED are both 8k TVs. They both feature Mini LED backlighting, and even though the local dimming feature on the Samsung does a better job at improving the contrast, they're both decent overall. The Samsung gets brighter in HDR, and it has wider viewing angles thanks to the 'Ultra Viewing Angle' layer. The Samsung also does a better job at upscaling 480p content, making it a better choice for watching DVDs.
Variants
- QN65QN900AFXZA (65")
- QN75QN900AFXZA (75")
- QN85QN900AFXZA (85")
- 65R648 (65")
- 75R648 (75")
Check Price
65"
QN65QN900AFXZA
SEE PRICE
Amazon.com65"
65R648
SEE PRICE
Amazon.com75"
QN75QN900AFXZA
SEE PRICE
Amazon.com75"
75R648
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Amazon.com85"
QN85QN900AFXZA
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Amazon.com85"
Main Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
8.1
7.9
480p Input
8.0
4.0
Contrast
7.5
8.9
Pre Calibration
6.7
8.9
Full Comparison
Design
Style
Design Picture
Curved
No
No
Accelerated Longevity Test
Uniformity Pictures
Month 30
50% Gray
Month 30
50% Gray
Longevity Graph
Stand
Stand Picture
Back
Back Picture
Wall Mount
VESA 400x300
VESA 400x400
Borders
Borders Picture
Borders
0.08" (0.2 cm)
0.39" (1.0 cm)
Thickness
Thickness Picture
Max Thickness
0.63" (1.6 cm)
2.99" (7.6 cm)
Build Quality
9.0
7.5
Build quality picture
Picture Quality
Contrast
7.5
8.9
Contrast Picture
Contrast
20,392 : 1
134,133 : 1
Native Contrast
1,658 : 1
3,065 : 1
Blooming
7.5
Blooming Photo
Lighting Zone Transitions
7.5
Preferred LD Video, Moving Object
Local Dimming
Yes
Yes
Backlight
Full-Array
Full-Array
Dimming Zones Count Of Tested TV
160
Contrast And Dark Details In Game Mode
8.0
Blooming Photo In Game Mode
Preferred LD Video, Moving Object In Game Mode
Game Transitions With VRR And Preferred LD
HDR Brightness
8.9
8.2
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
597 cd/m²
Yellow Skyscraper (~700 cd/m²)
353 cd/m²
Landscape Pool (~300 cd/m²)
255 cd/m²
Peak 2% Window
1,554 cd/m²
770 cd/m²
Peak 10% Window
1,590 cd/m²
1,067 cd/m²
Peak 25% Window
1,018 cd/m²
1,154 cd/m²
Peak 50% Window
618 cd/m²
817 cd/m²
Peak 100% Window
409 cd/m²
626 cd/m²
Sustained 2% Window
1,462 cd/m²
756 cd/m²
Sustained 10% Window
1,474 cd/m²
1,045 cd/m²
Sustained 25% Window
1,007 cd/m²
1,137 cd/m²
Sustained 50% Window
610 cd/m²
815 cd/m²
Sustained 100% Window
403 cd/m²
624 cd/m²
Automatic Brightness Limiting (ABL)
0.075
0.032
EOTF
Real Scene Highlight
1,440 cd/m²
HDR Brightness In Game Mode
8.7
8.2
HDR Hallway Photo
HDR Cityscape Photo
HDR Landscape Photo
Hallway Lights (~1950 cd/m²)
597 cd/m²
Yellow Skyscraper (~700 cd/m²)
348 cd/m²
Landscape Pool (~300 cd/m²)
256 cd/m²
Peak 2% Window
1,642 cd/m²
771 cd/m²
Peak 10% Window
1,592 cd/m²
1,069 cd/m²
Peak 25% Window
1,034 cd/m²
1,161 cd/m²
Peak 50% Window
615 cd/m²
824 cd/m²
Peak 100% Window
401 cd/m²
632 cd/m²
Sustained 2% Window
1,544 cd/m²
761 cd/m²
Sustained 10% Window
1,497 cd/m²
1,054 cd/m²
Sustained 25% Window
1,019 cd/m²
1,148 cd/m²
Sustained 50% Window
608 cd/m²
822 cd/m²
Sustained 100% Window
394 cd/m²
631 cd/m²
Automatic Brightness Limiting (ABL)
0.078
0.032
Game Mode EOTF
Real Scene Highlight
1,083 cd/m²
PQ EOTF Tracking
8.4
PQ EOTF Graph
600 Nit Tracking Delta
0.0102
1000 Nit Tracking Delta
0.0104
4000 Nit Tracking Delta
0.0105
SDR Brightness
8.9
8.9
Real Scene Peak Brightness
844 cd/m²
687 cd/m²
Peak 2% Window
1,364 cd/m²
724 cd/m²
Peak 10% Window
1,408 cd/m²
1,039 cd/m²
Peak 25% Window
896 cd/m²
1,123 cd/m²
Peak 50% Window
550 cd/m²
795 cd/m²
Peak 100% Window
386 cd/m²
608 cd/m²
Sustained 2% Window
1,285 cd/m²
720 cd/m²
Sustained 10% Window
1,333 cd/m²
1,018 cd/m²
Sustained 25% Window
891 cd/m²
1,106 cd/m²
Sustained 50% Window
543 cd/m²
792 cd/m²
Sustained 100% Window
381 cd/m²
606 cd/m²
Automatic Brightness Limiting (ABL)
0.073
0.033
Color Gamut
8.2
8.6
Wide Color Gamut
Yes
Yes
Color Gamut DCI-P3 Picture
DCI P3 xy
93.63%
90.95%
DCI P3 uv
96.01%
96.19%
Color Gamut Rec.2020 Picture
Rec 2020 xy
67.58%
75.03%
Rec 2020 uv
70.84%
82.71%
Color Volume
7.7
8.3
P3 Color Volume ITP Picture
1,000 cd/m² DCI P3 Coverage ITP
59.2%
77.1%
2020 Color Volume ITP Picture
10,000 cd/m² Rec 2020 Coverage ITP
43.4%
39.1%
White Luminance
743 cd/m²
Red Luminance
156 cd/m²
Green Luminance
528 cd/m²
Blue Luminance
64 cd/m²
Cyan Luminance
592 cd/m²
Magenta Luminance
221 cd/m²
Yellow Luminance
683 cd/m²
Normalized DCI P3 Coverage ITP
87.7%
Normalized Rec 2020 Coverage ITP
64.7%
Local Dimming
7.0
LD Video, Moving Object
LD Video, Real Content
LD Video, Real Content Side View
Local Dimming
Yes
Yes
Backlight
Full-Array
Full-Array
Pre Calibration
6.7
8.9
Pre White Balance Picture
Pre Gamma Curve Picture
Pre Color Picture
White Balance dE
4.80
1.97
Color dE
2.81
0.96
Gamma
1.96
2.13
Color Temperature
6,315 K
6,513 K
Picture Mode
Movie
Movie
Color Temp Setting
Warm 2
Warm
Gamma Setting
2.2
2.2
Post Calibration
9.5
9.7
Post White Balance Picture
Post Gamma Curve Picture
Post Color Picture
White Balance dE
0.34
0.17
Color dE
1.08
0.57
Gamma
2.20
2.20
Color Temperature
6,465 K
6,503 K
White Balance Calibration
20 point
11 point
Color Calibration
Yes
Yes
Gray Uniformity
7.8
7.4
50% Uniformity Picture
50% Std. Dev.
2.282%
1.286%
50% DSE
0.179%
0.202%
5% Uniformity Picture
5% Std. Dev.
0.968%
0.965%
5% DSE
0.080%
0.127%
Black Uniformity
6.6
7.8
Black Uniformity Picture With Preferred Local Dimming
Std. Dev.
0.306%
0.829%
Native Black Uniformity Picture
Native Std. Dev.
2.337%
1.509%
Viewing Angle
6.8
5.2
Viewing Angle Video
Chroma Graph
Color Washout
36°
21°
Hue Graph
Color Shift
25°
31°
Lightness Graph
Brightness Loss
47°
35°
Black Level Raise
70°
14°
Gamma Shift
17°
12°
Reflections
8.9
8.4
Reflections Picture
Average Room Off Picture
Bright Room Off Picture
Screen Finish
Glossy
Semi-gloss
Total Reflections
2.3%
3.2%
Indirect Reflections
1.4%
1.0%
Calculated Direct Reflections
0.9%
2.2%
Local Dimming In Game Mode
7.0
LD Video, Moving Object
LD Video, Real Content
LD Video, Real Content Side View
Local Dimming
Yes
Backlight
Full-Array
HDR Native Gradient
7.9
7.5
HDR Gradient Picture
100% Black to 50% Gray
4.0
50% Gray to 100% White
8.0
100% Black to 50% Red
8.0
50% Red to 100% Red
10
100% Black to 50% Green
6.0
50% Green to 100% Green
8.0
100% Black to 50% Blue
6.0
50% Blue to 100% Blue
10
Color Depth
10 Bit
Red (Std. Dev.)
0.122
Green (Std. Dev.)
0.120
Blue (Std. Dev.)
0.090
Gray (Std. Dev.)
0.109
Low-Quality Content Smoothing
5.6
Low-Quality Content Smoothing Picture
Smoothing
5.0
Detail Preservation
7.0
Upscaling: Sharpness Processing
8.0
4.0
Sharpness Picture - 480p
Pixels
Pixels Picture
Subpixel Layout
BGR
Type
LED
LED
Sub-Type
VA
VA
720p Input
8.0
720p Picture
1080p Input
9.0
1080p Picture
4k Input
9.5
4k Picture
8k Input
9.5
8k Picture
Temporary Image Retention
10
Image Retention Picture
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%
Permanent Burn-In Risk
10
Permanent Burn-In Risk
No
Motion
Response Time
8.3
8.6
Motion Blur Picture
Response Time Chart
80% Response Time
4.6 ms
3.6 ms
100% Response Time
10.2 ms
9.5 ms
Flicker-Free
9.9
9.9
Backlight chart
Flicker-Free
No
No
PWM Dimming Frequency
960 Hz
960 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
6.8
6.7
Frame Hold Time @ 24 fps
31.5 ms
32.2 ms
Frame Hold Time @ 60 fps
6.5 ms
7.2 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
9.4
9.4
Native Refresh Rate
120 Hz
120 Hz
Variable Refresh Rate
Yes
Yes
HDMI Forum VRR
Unknown
Yes
FreeSync
Yes
Yes
G-SYNC Compatible
Yes
Yes
4k VRR Maximum
120 Hz
120 Hz
4k VRR Minimum
< 20 Hz
< 20 Hz
1080p VRR Maximum
120 Hz
120 Hz
1080p VRR Minimum
< 20 Hz
< 20 Hz
1440p VRR Maximum
120 Hz
120 Hz
1440p VRR Minimum
< 20 Hz
< 20 Hz
VRR + Local Dimming
Yes
VRR Supported Connectors
HDMI
Inputs
Input Lag
9.7
9.4
1080p @ 60Hz
10.1 ms
15.3 ms
1080p @ 60Hz Outside Game Mode
101.1 ms
112.3 ms
1080p @ 120Hz
5.8 ms
6.3 ms
1080p @ 144Hz
N/A
1440p @ 60Hz
10.4 ms
15.2 ms
1440p @ 120Hz
5.9 ms
6.3 ms
1440p @ 144Hz
N/A
4k @ 60Hz
10.6 ms
15.1 ms
4k @ 60Hz + 10-Bit HDR
10.4 ms
15.2 ms
4k @ 60Hz @ 4:4:4
10.6 ms
15.1 ms
4k @ 60Hz Outside Game Mode
76.2 ms
110.6 ms
4k @ 60Hz With Interpolation
21.1 ms
103.9 ms
4k @ 120Hz
6.0 ms
6.2 ms
4k @ 144Hz
N/A
8k @ 60Hz
10.6 ms
15.2 ms
1080p with Variable Refresh Rate
1440p with VRR
4k with VRR
8k with VRR
Supported Resolutions
10
10
Resolution
8k
8k
480p @ 59.94Hz (Widescreen)
Yes
720p @ 59.94Hz
Yes
1080p @ 60Hz @ 4:4:4
Yes
Yes
1080p @ 120Hz
Yes (native support)
Yes
1080p @ 144Hz
No
1440p @ 60Hz
Yes (native support)
Yes (forced resolution required)
1440p @ 120Hz
Yes (native support)
Yes
1440p @ 144Hz
No
4k @ 60Hz
Yes
Yes
4k @ 60Hz @ 4:4:4
Yes
Yes
4k @ 120Hz
Yes (native support)
Yes
4k @ 120Hz @ 4:4:4
Yes
4k @ 144Hz
No
8k @ 30Hz or 24Hz
Yes
Yes
8k @ 60Hz
Yes
Yes
PS5 Compatibility
PS5 Screenshot
Auto Low Latency Mode (ALLM)
Yes
Yes
4k @ 120Hz
Yes
Yes
1440p @ 120Hz
PS5 can't do 1440p
Yes
1080p @ 120Hz
Yes
Yes
HDR
Yes
Xbox Series X Screenshot
VRR
PS5 can't do VRR yet
Yes
PS5, 4k @ 120Hz + HDR
Yes
PS5, 4k @ 60Hz + HDR
Yes
Xbox Series X, 4k @ 120Hz + HDR
Yes
Xbox Series X, 4k @ 120Hz
Yes
Yes
Xbox Series X, 4k @ 60Hz + HDR
Yes
Xbox Series X, 1440p @ 120Hz
Yes
Yes
Xbox Series X, 1080p @ 120Hz
Yes
Yes
Xbox Series X, Variable Refresh Rate
Yes
Yes
Xbox Series X|S Compatibility
Xbox Series X Screenshot
Auto Low Latency Mode (ALLM)
Yes
4k @ 120Hz
Yes
Yes
1440p @ 120Hz
Yes
Yes
1080p @ 120Hz
Yes
Yes
HDR
Yes
VRR
Yes
Yes
Inputs Specifications
HDR10
Yes
Yes
HDR10+
Yes
No
Dolby Vision
No
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 1,2,3,4)
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
USB 3.0
No
No
Variable Analog Audio Out
No
Yes
Wi-Fi Support
Yes (2.4 GHz, 5 GHz)
Yes (2.4 GHz, 5 GHz)
Input Photos
Side Inputs Picture
Rear Inputs Picture
Total Inputs
HDMI
4
4
USB
3
1
Digital Optical Audio Out
1
1
Analog Audio Out 3.5mm
0
1
Analog Audio Out RCA
0
0
Component In
0
0
Composite In
0
0
Tuner (Cable/Ant)
1
1
Ethernet
1
1
DisplayPort
0
0
IR In
0
0
SD/SDHC
0
Audio Passthrough
ARC/eARC Port
Yes
eARC
eARC: Dolby Atmos Over Dolby Digital Plus
Yes
Yes
eARC: Dolby Digital Plus 7.1
Yes
eARC: LPCM 7.1 Over Dolby MAT
Yes
eARC: Dolby TrueHD 7.1
Yes
ARC
Yes (HDMI 3)
eARC: DTS:X Over DTS-HD MA
No
Yes
eARC: DTS-HD Master Audio 7.1
Yes
eARC: LPCM Channels (Bitstream)
2.0
ARC: Dolby Digital 5.1
Yes
Yes
ARC: DTS 5.1
No
Yes
Optical: Dolby Digital 5.1
Yes
Yes
Optical: DTS 5.1
No
Yes
Sound Quality
Frequency Response
6.9
7.4
Frequency Response
Low-Frequency Extension
119.87 Hz
75.51 Hz
Std. Dev. @ 70
3.88 dB
4.13 dB
Std. Dev. @ 80
3.47 dB
4.13 dB
Std. Dev. @ Max
3.45 dB
4.66 dB
Max
90.0 dB SPL
93.8 dB SPL
Dynamic Range Compression
4.41 dB
4.40 dB
Distortion
7.2
6.9
Total Harmonic Distortion
Weighted THD @ 80
0.481
0.127
Weighted THD @ Max
1.285
0.962
IMD @ 80
0.64%
0.52%
IMD @ Max
2.27%
6.85%
Smart Features
Interface
8.5
8.0
Smart TV Picture
Smart OS
Tizen
Roku TV
Version
2021
10.0.2
Ease of Use
Easy
Easy
Smoothness
Very Smooth
Very Smooth
Time Taken to Select YouTube
2 s
4 s
Time Taken to Change Backlight
5 s
4 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
8.5
8.0
Apps Picture
App Selection
Great
Great
App Smoothness
Very Smooth
Average
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
7.0
Remote Picture
Size
Small
Medium
Voice Control
Many Features
Search, Some Other Features
CEC Menu Control
Yes
Yes
Other Smart Features
Yes
No
Remote App
Samsung SmartThings
Roku
TV Controls
Controls Picture
In The Box
In The Box Picture
Misc
Power Consumption
156 W
130 W
Power Consumption (Max)
331 W
290 W
Firmware
1012
10.0.2 build 4264-AH
Check Price
65"
QN65QN900AFXZA
SEE PRICE
Amazon.com65"
65R648
SEE PRICE
Amazon.com75"
QN75QN900AFXZA
SEE PRICE
Amazon.com75"
75R648
SEE PRICE
Amazon.com85"
QN85QN900AFXZA
SEE PRICE
Amazon.com85"
Samsung QN900A 8K
TCL 6 Series/R648 2021 8k QLED
Comments
Samsung QN900A 8K vs TCL 6 Series/R648 2021 8k QLED: Main Discussion
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