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- Table of Contents
- Top
- Main Differences
- Design
- Picture Quality
- Motion
- Inputs
- Features
- Comments
LG 34UC79G-B vs Samsung C34F791/CF791
Side-by-Side Comparison
Products
LG 34UC79G-B
Samsung C34F791/CF791
Tested using Methodology v1.0
Updated Dec 24, 2021 06:04 PM
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Amazon.comTested using Methodology v1.0
Updated Oct 05, 2022 07:33 PM
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Amazon.com
Size34"
LCD TypeIPS
Variable Refresh RateFreeSync
Native Resolution2560 x 1080
Native Refresh Rate144 Hz
Size34"
LCD TypeVA
Variable Refresh RateFreeSync
Native Resolution3440 x 1440
Native Refresh Rate100 Hz
Variants
- 34UC79G-B (34")
- C34F791 (34")
Our Verdict
LG 34UC79G-B
Samsung C34F791/CF791
The LG 34UC79G-B is a better monitor than the Samsung C34F791/CF791 for almost every use, unless you'll be using it in a dark room. The Samsung CF791 has better resolution giving you more details on the screen, but the LG34UC79G has better viewing angles, and you'll enjoy gaming more as it has significantly better input lag and marginally better image flicker to clear blur.
Check Price
34"
34UC79G-B
SEE PRICE
Amazon.com34"
C34F791
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Amazon.com34"
34UC79G-B
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Walmart.com34"
C34F791
SEE PRICE
Walmart.com34"
34UC79G-B
SEARCH
BestBuy.com34"
C34F791
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BestBuy.com34"
34UC79G-B
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LG.com34"
C34F791
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Samsung.comMain Differences forMixed Usage
Mixed Usage
Threshold
Mixed Usage
7.5
6.9
Vertical Viewing Angle
7.8
4.4
Horizontal Viewing Angle
7.6
4.9
Input Lag
9.5
7.2
Resolution and Size
8.0
8.9
Full Comparison
Design
Style
Design Picture
Size
34"
34"
Curved
Yes
Yes
Curve radius
3800R
1500R
Weight (without stand)
13.9 lbs (6.3 kg)
13.2 lbs (6.0 kg)
Weight (with stand)
18.5 lbs (8.4 kg)
16.5 lbs (7.5 kg)
Stand
Stand picture
Width
19.1" (48.5 cm)
9.7" (24.6 cm)
Depth
10.0" (25.4 cm)
12.2" (31.0 cm)
Ergonomics
4.8
4.7
Ergonomics picture
Height Adjustment
4.7" (11.9 cm)
3.9" (9.9 cm)
Switch portrait/landscape
No
No
Swivel Range
N/A
N/A
Tilt Range
-22.5° to 2.5°
-20° to 15°
Back
Back picture
Wall Mount
VESA 100x100
VESA 100x100
Borders
Borders picture
Borders
0.6" (1.5 cm)
0.3" (0.8 cm)
Thickness
Thickness picture
Thickness (with stand)
6.3" (16.0 cm)
8.1" (20.6 cm)
Thickness (without stand)
2.0" (5.1 cm)
4.6" (11.7 cm)
Build Quality
7.5
8.0
Build Quality picture
Picture Quality
Contrast
6.6
7.6
Checkerboard Picture
LCD Type
IPS
VA
Native Contrast
1,390 : 1
2,527 : 1
Contrast with local dimming
N/A
N/A
Local Dimming
0.0
0.0
Local Dimming Video
Local Dimming
No
No
Backlight
Direct
Direct
SDR Peak Brightness
6.5
7.0
SDR Real Scene
222 cd/m²
264 cd/m²
SDR Peak 2% Window
249 cd/m²
247 cd/m²
SDR Peak 10% Window
249 cd/m²
246 cd/m²
SDR Peak 25% Window
249 cd/m²
246 cd/m²
SDR Peak 50% Window
249 cd/m²
245 cd/m²
SDR Peak 100% Window
249 cd/m²
244 cd/m²
SDR Sustained 2% Window
210 cd/m²
246 cd/m²
SDR Sustained 10% Window
176 cd/m²
246 cd/m²
SDR Sustained 25% Window
190 cd/m²
245 cd/m²
SDR Sustained 50% Window
199 cd/m²
245 cd/m²
SDR Sustained 100% Window
199 cd/m²
244 cd/m²
SDR ABL
0.000
0.001
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
7.6
4.9
Horizontal Viewing Angle Video
Horizontal Color Shift Picture
Color Shift from Left
42°
33°
Color Shift from Right
46°
32°
Horizontal Brightness Picture
Brightness from Left
50°
45°
Brightness from Right
52°
45°
Horizontal Black Level Picture
Black Level from Left
75°
12°
Black Level from Right
75°
11°
Curve Radius
3,800R
1,500R
Vertical Viewing Angle
7.8
4.4
Vertical Viewing Angle Video
Vertical Color Shift Picture
Color Shift from Below
19°
26°
Color Shift from Above
29°
26°
Vertical Brightness Picture
Brightness from Below
29°
33°
Brightness from Above
34°
33°
Vertical Black Level Picture
Black Level from Below
75°
5°
Black Level from Above
75°
5°
Gray Uniformity
8.3
8.2
50% Uniformity Picture
50% Std. Dev.
3.641%
4.408%
50% DSE
0.128%
0.103%
5% Uniformity Picture
5% Std. Dev.
0.518%
1.800%
5% DSE
0.069%
0.061%
Black Uniformity
4.8
5.2
Native Black Uniformity Picture
Native Std. Dev.
2.782%
2.554%
Black Uniformity Picture with Local Dimming
Std. Dev. w/ L.D.
N/A
N/A
Pre Calibration
6.9
7.2
Pre Calibration Picture
Pre Gamma Curve Picture
Pre Color Picture
Picture Mode
Custom
Custom
Luminance
283 cd/m²
243 cd/m²
Luminance Settings
100
100
Contrast Setting
70
75
RGB controls
Custom 50-50-50
Cool1
Color Temperature
6,849 K
6,346 K
White Balance dE
3.01
3.46
Color dE
4.04
3.09
Gamma
2.26
2.26
Post Calibration
9.4
9.4
Post Calibration Picture
Post Gamma Curve Picture
Post Color Picture
Picture Mode
Custom Color
Custom
Luminance
99 cd/m²
99 cd/m²
Luminance Settings
1
23
Contrast Setting
70
75
RGB Controls
49-51-44
35-44-50
Color Temperature
6,403 K
6,432 K
White Balance dE
0.72
0.63
Color dE
0.81
0.84
Gamma
2.18
2.19
SDR Color Gamut
8.3
8.9
Color Gamut sRGB Picture
sRGB xy
94.5%
95.6%
Color Gamut ARGB Picture
Adobe RGB xy
69.5%
80.8%
SDR Color Volume
8.1
9.4
sRGB Color Volume ITP picture
sRGB in ICtCp
88.5%
98.5%
Adobe RGB Color Volume ITP Picture
Adobe RGB in ICtCp
72.0%
88.2%
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
10
7.7
Image Retention Picture
IR after 0 min recovery
0.00%
0.11%
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
8.3
8.1
Gradient Picture
Color Depth
8 Bit
8 Bit
Color Bleed
10
10
Color bleed horizontal
Pixel row error
0.000%
0.001%
Color bleed vertical
Pixel column error
0.000%
0.001%
Reflections
7.0
7.5
Average room
Average room off picture
Bright room off picture
Motion
Motion Blur
8.8
9.0
Motion Blur Picture
Response Time Chart
80% Response Time
4.6 ms
4.0 ms
100% Response Time
13.5 ms
13.7 ms
Best Overdrive Setting
Normal
Faster
Image Flicker
9.3
7.5
Backlight Picture
Flicker-free
Yes
Yes
PWM Dimming Frequency
0 Hz
0 Hz
Black Frame Insertion (BFI)
Yes
No
BFI Picture
BFI Frequency Picture
BFI Maximum Frequency
144 Hz
N/A
BFI Minimum Frequency
100 Hz
N/A
Refresh Rate
9.2
8.8
Variable Refresh Rate
FreeSync
FreeSync
Native Refresh Rate
144 Hz
100 Hz
Factory Overclock
N/A
N/A
Variable Refresh Rate
FreeSync
FreeSync
G-SYNC Compatible
Yes
Partial
VRR Maximum
144 Hz
100 Hz
VRR Minimum
< 20 Hz
< 20 Hz
VRR Maximum With OC
N/A
N/A
VRR Supported Connectors
DisplayPort
DisplayPort, HDMI
Inputs
Input Lag
9.5
7.2
Native Resolution
4.1 ms
20.7 ms
Non-Native Res @ Native Refresh
N/A
N/A
Native Resolution @ 60 Hz
9.3 ms
26.9 ms
Variable Refresh Rate
4.8 ms
23.6 ms
10 bit HDR
N/A
N/A
Black Frame Insertion (BFI)
8.2 ms
N/A
Resolution and Size
8.0
8.9
Native Resolution
2560 x 1080
3440 x 1440
Aspect Ratio
21:9
21:9
Megapixels
2.8 MP
5.0 MP
Pixel Density
82 PPI
110 PPI
Screen Diagonal
34.0"
34.0"
Screen Area
412 in²
411 in²
Inputs
Inputs 1
Inputs 2
Total Inputs
DisplayPort
1 (DP 1.2)
1 (DP 1.2)
Mini DisplayPort
No
No
HDMI
2 (HDMI 2.0)
2 (HDMI 2.0)
DVI
No
No
VGA
No
No
DisplayPort Out
No
No
USB
2 (USB 3.0)
2 (USB 3.0)
USB C
No
No
Analog Audio Out 3.5mm
2
1
Microphone In 3.5mm
No
No
Digital Optical Audio Out
No
No
Analog Audio Out RCA
No
No
Power Supply
External Brick
External Brick
Features
Additional Features
Speakers
No
Yes
HDR10
No
No
Multiple input display
No
PIP + PBP
On-Screen Display (OSD)
OSD picture
Controls
Controls picture
In The Box
In The Box picture
Check Price
34"
34UC79G-B
SEE PRICE
Amazon.com34"
C34F791
SEE PRICE
Amazon.com34"
34UC79G-B
SEE PRICE
Walmart.com34"
C34F791
SEE PRICE
Walmart.com34"
34UC79G-B
SEARCH
BestBuy.com34"
C34F791
SEARCH
BestBuy.com34"
34UC79G-B
SEARCH
LG.com34"
C34F791
SEARCH
Samsung.com
LG 34UC79G-B
Samsung C34F791/CF791
Comments
LG 34UC79G-B vs Samsung C34F791/CF791: Main Discussion
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