Comparison between Samsung C34J791 vs Dell U4021QW

General Info
Model Number	Samsung C34J791	Dell U4021QW

Price	Check on Amazon	Check on Amazon
Type	Monitor	Monitor
Year	2018	2021
Brand	Samsung	Dell
Model Number	C34J791	U4021QW
Alias	LC34J791WTEXXS
Display
Screen Size Class	34" (inches)	40" (inches)
Diagonal Size	34 in 86.4 cm 863.6 mm 2.83 ft
Screen Width	31.49 in 80 cm 799.8 mm 2.62 ft	37.27 in 94.7 cm 946.6 mm 3.11 ft
Screen Height	13.18 in 33.5 cm 334.8 mm 1.1 ft
Display Curvature	1500	2500
Display Manufacturer	Samsung
Display Type	SVA	IPS
Display Bit Depth	8 bits	10 bits
Frame Rate Control	No
Max Number of Colors	16777216	1073741824
Bits	24	30
Screen Aspect Ratio	21:9	21:9
Screen Resolution	3440 x 1440	5120 x 2160
Screen Pixel Pitch	0.233 mm
Screen Pixel Density	109 ppi
Screen-to-Body Ratio	91.27 %
Backlight Source	Edge LED	W-LED
DCI P3		98%
sRGB	125 %	100 %
Adobe RGB 1998	92 %
Screen Brightness	300 cd/m²	300 cd/m²
Static Screen Contrast	3000 : 1	1000 : 1
Dynamic Screen Contrast	100000000 : 1
Screen Horizontal Viewing Angle	178 °	178 °
Screen Vertical Viewing Angle	178 °	178 °
Screen Input Lag	6 ms
Display Minimum Response Time	4 ms	5 ms
Display Average Response Time	14 ms	8 ms
Display Coating	Anti-glare/Matte (2H)	Anti-glare/Matte (3H)
3D	No	No
Size, weight, color
Case Depth	6.57 in 16.7 cm 167 mm 0.55 ft
Case Weight	6.3 kg 14 lbs
Case Width with Stand	31.84 in 80.9 cm 808.7 mm 2.65 ft	37.27 in 94.7 cm 946.6 mm 3.11 ft
Case Height with Stand	20.31 in 51.6 cm 516 mm 1.69 ft	18.02 in 45.8 cm 457.8 mm 1.5 ft
Case Depth with Stand	12.18 in 30.9 cm 309.4 mm 1.02 ft	9.76 in 24.8 cm 248 mm 0.81 ft
Case Weight with Stand	7.7 kg 17 lbs	9.5 kg 21 lbs
Case Color	White, Silver	Black
Hardware
Built-in Camera	No	No
Connectivity	1 x DisplayPort 1.2 2 x Thunderbolt 3.0 1 x 3.5 mm Audio Out 2 x USB 2.0 (downstream) 1 x HDMI 1.4	1 x USB 3.2 (Type-C; downstream; 15W) 1 x Ethernet RJ45 (Gigabit) 1 x DisplayPort 1.4 1 x 3.5 mm Audio Out (line-out for speakers) 1 x Thunderbolt 3.0 (Type-C; upstream; 90W; DP Alt Mode) 2 x HDMI 2.0 4 x USB 3.2 (Type-A; Gen 1; downstream) 1 x USB 3.2 (Type-B; Gen 1; upstream)
Audio
Audio Speakers	2 x 7W	2 x 9W
Features
Cool Features	Eye Saver Mode Flicker-free technology Picture-by-Picture Picture-in-Picture HDCP (High-bandwidth Digital Content Protection) AMD FreeSync technology Eco Saving Plus	KVM Switch Low Blue Light Picture-in-Picture Picture-by-Picture ComfortView Plus Flicker-free technology
Extra Features	Anti-theft stand lock slot - Kensington	Security lock slot
Ergonomics
Case Width	31.84 in 80.9 cm 808.7 mm 2.65 ft
Case Height	14.28 in 36.3 cm 362.8 mm 1.19 ft
Vesa Mount Support	Yes	Yes
VESA Interface Standard Size	100 x 100	100 x 100
Removable VESA Stand	Yes	Yes
Height Adjustment	Yes	Yes
Height Adjustment Range	100 mm 10 cm 3.937 in 0.3281 ft	120 mm 12 cm 4.7244 in 0.3937 ft
Landscape or Portrait Pivot Support	No	No
Left or Right Swivel Support	No	Yes
Left Swivel		30 °
Right Swivel		30 °
Forward and Backward Tilt Support	Yes	Yes
Forward Tilt	2 °	5 °
Backward Tilt	34 °	21 °
Frequency and Interpolation
Vertical Digital Frequency	48 Hz - 100 Hz	60 Hz
Horizontal Digital Frequency	30 kHz - 152 kHz
Screen Interpolation Measurement Unit		NULL
Accessories
Extras		DisplayPort cable HDMI cable Thunderbolt 4 (USB-C) Active Cable USB Type-A to Type-B cable
Certificates and Standards
Licenses	ENERGY STAR FCC Class B ISO9241-307 TÜV/Ergonomics
Usage and Storage Requirements
Safe Operating Temperature Level	10 °C - 40 °C 50 °F - 104 °F	0 °C - 40 °C 32 °F - 104 °F
Safe Operating Humidity Level	10 % - 80 %	10 % - 80 %
Internal Storage Temperature	-20 °C - 60 °C -4 °F - 140 °F	-20 °C - 60 °C -4 °F - 140 °F
Internal Storage Humidity	5 % - 95 %	5 % - 90 %
Max Operating Altitude		5000
Max Storage Altitude		12192

Samsung C34J791

Dell U4021QW