Notice: Your browser is not supported or outdated so some features of the site might not be available.
Products
Samsung C34J791/CJ791
ASUS ROG Swift PG348Q
Tested using Methodology v1.0
Updated Jul 31, 2024 03:34 PM
SEE PRICE
Amazon.comTested using Methodology v1.0
Updated Sep 08, 2021 06:23 PM
SEE PRICE
Amazon.com
Size34"
LCD TypeVA
Variable Refresh RateFreeSync
Native Resolution3440 x 1440
Native Refresh Rate100 Hz
Size34"
LCD TypeIPS
Variable Refresh RateG-Sync
Native Resolution3440 x 1440
Native Refresh Rate60 Hz
Our Verdict
Samsung C34J791/CJ791
ASUS ROG Swift PG348Q
The ASUS ROG PG348Q is better than the Samsung C34J791/CJ791 if you care about good viewing angles. The ASUS ROG PG348Q has an IPS panel whereas the Samsung has a VA one. The ASUS also has a faster response time with a smaller blur trail and better ergonomics to position it comfortably. The Samsung CJ791, on the other hand, has a lower input lag which makes it very responsive to your actions.
Variants
- C34J791 (34")
- PG348Q (34")
Check Price
34"
C34J791
Searching
Finding store34"
PG348Q
Searching
Finding store34"
C34J791
Searching
Finding store34"
PG348Q
Searching
Finding store34"
C34J791
Searching
Finding store34"
PG348Q
Searching
Finding store34"
C34J791
Searching
Finding store34"
PG348Q
Searching
Finding store34"
C34J791
Searching
Finding store34"
PG348Q
Searching
Finding store34"
C34J791
Searching
Finding storeMain Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
7.2
7.6
Vertical Viewing Angle
4.6
7.8
Horizontal Viewing Angle
4.8
7.8
Full Comparison
Design
Style
Design Picture
Size
34"
34"
Curved
Yes
Yes
Curve radius
1500R
3800R
Weight (without stand)
15.0 lbs (6.8 kg)
17.2 lbs (7.8 kg)
Weight (with stand)
16.5 lbs (7.5 kg)
24.9 lbs (11.3 kg)
Stand
Stand picture
Width
9.6" (24.4 cm)
21.0" (53.3 cm)
Depth
12.2" (31.0 cm)
13.5" (34.3 cm)
Ergonomics
4.7
6.1
Ergonomics picture
Height Adjustment
3.9" (9.9 cm)
4.4" (11.2 cm)
Switch portrait/landscape
No
No
Swivel Range
N/A
-55° to 55°
Tilt Range
-20° to 15°
-20° to 2.5°
Back
Back picture
Wall Mount
VESA 100x100, VESA 200x200
VESA 100x100
Borders
Borders picture
Borders
0.4" (1.0 cm)
0.5" (1.3 cm)
Thickness
Thickness picture
Thickness (with stand)
8.3" (21.1 cm)
10.8" (27.4 cm)
Thickness (without stand)
6.5" (16.5 cm)
4.0" (10.2 cm)
Build Quality
8.0
8.0
Build Quality picture
Picture Quality
Contrast
7.8
6.3
Checkerboard Picture
LCD Type
VA
IPS
Native Contrast
2,904 : 1
1,195 : 1
Contrast with local dimming
N/A
N/A
Local Dimming
0.0
0.0
Local Dimming Video
Local Dimming
No
No
Backlight
Edge
Edge
SDR Peak Brightness
6.9
7.6
SDR Real Scene
251 cd/m²
294 cd/m²
SDR Peak 2% Window
248 cd/m²
325 cd/m²
SDR Peak 10% Window
249 cd/m²
326 cd/m²
SDR Peak 25% Window
249 cd/m²
326 cd/m²
SDR Peak 50% Window
248 cd/m²
326 cd/m²
SDR Peak 100% Window
248 cd/m²
326 cd/m²
SDR Sustained 2% Window
248 cd/m²
325 cd/m²
SDR Sustained 10% Window
249 cd/m²
326 cd/m²
SDR Sustained 25% Window
249 cd/m²
326 cd/m²
SDR Sustained 50% Window
248 cd/m²
326 cd/m²
SDR Sustained 100% Window
248 cd/m²
326 cd/m²
SDR ABL
0.000
0.000
HDR Peak Brightness
0.0
0.0
HDR Real Scene
N/A
N/A
HDR Peak 2% Window
N/A
N/A
HDR Peak 10% Window
N/A
N/A
HDR Peak 25% Window
N/A
N/A
HDR Peak 50% Window
N/A
N/A
HDR Peak 100% Window
N/A
N/A
HDR Sustained 2% Window
N/A
N/A
HDR Sustained 10% Window
N/A
N/A
HDR Sustained 25% Window
N/A
N/A
HDR Sustained 50% Window
N/A
N/A
HDR Sustained 100% Window
N/A
N/A
HDR ABL
N/A
N/A
Horizontal Viewing Angle
4.8
7.8
Horizontal Viewing Angle Video
Horizontal Color Shift Picture
Color Shift from Left
31°
47°
Color Shift from Right
30°
47°
Horizontal Brightness Picture
Brightness from Left
44°
53°
Brightness from Right
40°
53°
Horizontal Black Level Picture
Black Level from Left
13°
75°
Black Level from Right
13°
75°
Curve Radius
1,500R
3,800R
Vertical Viewing Angle
4.6
7.8
Vertical Viewing Angle Video
Vertical Color Shift Picture
Color Shift from Below
26°
25°
Color Shift from Above
23°
26°
Vertical Brightness Picture
Brightness from Below
37°
31°
Brightness from Above
35°
31°
Vertical Black Level Picture
Black Level from Below
6°
75°
Black Level from Above
5°
75°
Gray Uniformity
8.2
8.5
50% Uniformity Picture
50% Std. Dev.
4.951%
3.468%
50% DSE
0.112%
0.116%
5% Uniformity Picture
5% Std. Dev.
0.915%
0.326%
5% DSE
0.059%
0.034%
Black Uniformity
4.9
2.9
Native Black Uniformity Picture
Native Std. Dev.
2.766%
4.041%
Black Uniformity Picture with Local Dimming
Std. Dev. w/ L.D.
N/A
N/A
Pre Calibration
7.3
5.5
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
Custom
Racing Mode
Luminance
117 cd/m²
280 cd/m²
Luminance Settings
53
80
Contrast Setting
75
50
RGB controls
Cool 1
100-100-100
Color Temperature
6,879 K
7,077 K
White Balance dE
3.52
5.09
Color dE
2.78
4.20
Gamma
2.22
1.97
Post Calibration
9.5
9.4
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Custom
Racing Mode
Luminance
100 cd/m²
99 cd/m²
Luminance Settings
39
21
Contrast Setting
100
50
RGB Controls
36-40-44
100-100-94
Color Temperature
6,466 K
6,470 K
White Balance dE
0.48
0.95
Color dE
0.71
0.62
Gamma
2.18
2.18
SDR Color Gamut
8.9
8.9
Color Gamut sRGB Picture
sRGB xy
95.4%
99.9%
Color Gamut ARGB Picture
Adobe RGB xy
81.8%
77.3%
SDR Color Volume
9.5
9.1
sRGB Color Volume ITP picture
sRGB in ICtCp
99.2%
97.9%
Adobe RGB Color Volume ITP Picture
Adobe RGB in ICtCp
89.5%
82.5%
HDR Color Gamut
0.0
0.0
Wide Color Gamut
No
No
Color Gamut DCI-P3 Picture
DCI P3 xy
N/A
N/A
Color Gamut Rec.2020 Picture
Rec. 2020 xy
N/A
N/A
HDR Color Volume
0.0
0.0
P3 Color Volume ITP Picture
DCI-P3 in ICtCp
N/A
N/A
2020 Color Volume ITP Picture
Rec. 2020 in ICtCp
N/A
N/A
Image Retention
7.7
10
Image Retention Picture
IR after 0 min recovery
0.14%
0.00%
IR after 2 min recovery
0.00%
0.00%
IR after 4 min recovery
0.00%
0.00%
IR after 6 min recovery
0.00%
0.00%
IR after 8 min recovery
0.00%
0.00%
IR after 10 min recovery
0.00%
0.00%
Gradient
8.5
8.6
Gradient Picture
Color Depth
8 Bit
8 Bit
Color Bleed
10
10
Color bleed horizontal
Pixel row error
0.001%
0.000%
Color bleed vertical
Pixel column error
0.001%
0.000%
Reflections
7.5
7.5
Average room
Average room off picture
Bright room off picture
Motion
Motion Blur
8.7
9.2
Motion Blur Picture
Response Time Chart
80% Response Time
4.9 ms
4.1 ms
100% Response Time
14.0 ms
10.9 ms
Best Overdrive Setting
Fastest
Normal
Image Flicker
7.5
7.5
Backlight Picture
Flicker-free
No
Yes
PWM Dimming Frequency
>1000 Hz
0 Hz
Black Frame Insertion (BFI)
No
No
BFI Picture
BFI Frequency Picture
BFI Maximum Frequency
N/A
N/A
BFI Minimum Frequency
N/A
N/A
Refresh Rate
8.8
8.1
Variable Refresh Rate
FreeSync
G-Sync
Native Refresh Rate
100 Hz
60 Hz
Factory Overclock
N/A
100 Hz
Variable Refresh Rate
FreeSync
G-Sync
G-SYNC Compatible
Yes
Yes (Native)
VRR Maximum
100 Hz
60 Hz
VRR Minimum
< 20 Hz
< 20 Hz
VRR Maximum With OC
N/A
100 Hz
VRR Supported Connectors
DisplayPort, HDMI
DisplayPort
Inputs
Input Lag
9.4
9.1
Native Resolution
5.7 ms
7.6 ms
Non-Native Res @ Native Refresh
5.8 ms
N/A
Native Resolution @ 60 Hz
9.1 ms
13.2 ms
Variable Refresh Rate
6.0 ms
7.9 ms
10 bit HDR
N/A
N/A
Black Frame Insertion (BFI)
N/A
N/A
Resolution and Size
8.9
8.9
Native Resolution
3440 x 1440
3440 x 1440
Aspect Ratio
21:9
21:9
Megapixels
5.0 MP
5.0 MP
Pixel Density
110 PPI
109 PPI
Screen Diagonal
34.0"
34.1"
Screen Area
411 in²
415 in²
Inputs
Inputs 1
Inputs 2
Total Inputs
DisplayPort
1 (DP 1.2)
1 (DP 1.2)
Mini DisplayPort
No
No
HDMI
1 (HDMI 2.0)
1 (HDMI 1.4)
DVI
No
No
VGA
No
No
DisplayPort Out
No
No
USB
2 (USB 2.0)
4 (USB 3.0)
USB C
2 (Thunderbolt 3, USB, PD)
No
Analog Audio Out 3.5mm
1
1
Microphone In 3.5mm
No
No
Digital Optical Audio Out
No
No
Analog Audio Out RCA
No
No
Power Supply
External Brick
Internal
Features
Additional Features
Speakers
Yes
Yes
HDR10
No
No
Multiple input display
PIP + PBP
No
On-Screen Display (OSD)
OSD picture
Controls
Controls picture
In The Box
In The Box picture
Check Price
34"
C34J791
Searching
Finding store34"
PG348Q
Searching
Finding store34"
C34J791
Searching
Finding store34"
PG348Q
Searching
Finding store34"
C34J791
Searching
Finding store34"
PG348Q
Searching
Finding store34"
C34J791
Searching
Finding store34"
PG348Q
Searching
Finding store34"
C34J791
Searching
Finding store34"
PG348Q
Searching
Finding store34"
C34J791
Searching
Finding store
Samsung C34J791/CJ791
ASUS ROG Swift PG348Q
Comments
ASUS ROG Swift PG348Q vs Samsung C34J791/CJ791: 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.