Comparison between HP Z23i vs Dell S2421HN

General Info
Model Number	HP Z23i	Dell S2421HN

Price	Check on Amazon	Check on Amazon
Type	Monitor	Monitor
Year	2013	2020
Brand	HP	Dell
Model Number	Z23i	S2421HN
Alias	D7Q13A4	S2421NX
Display
Screen Size Class	23" (inches)	24" (inches)
Diagonal Size	23 in 58.4 cm 584.2 mm 1.92 ft	23.8 in 60.4 cm 604.478 mm 1.98 ft
Screen Width	20.05 in 50.9 cm 509.184 mm 1.67 ft	20.75 in 52.7 cm 527.04 mm 1.73 ft
Screen Height	11.28 in 28.6 cm 286.416 mm 0.94 ft	11.67 in 29.6 cm 296.46 mm 0.97 ft
Display Manufacturer	LG Display
Display Type	AH-IPS	IPS
Display Bit Depth	8 bits (6 bits + FRC)	8 bits
Frame Rate Control	Yes
Max Number of Colors	16777216	16777216
Bits	24	24
Screen Aspect Ratio	16:9	16:9
Screen Resolution	1920 x 1080	1920 x 1080
Screen Pixel Pitch	0.265 mm	0.275 mm
Screen Pixel Density	95 ppi	92 ppi
Screen-to-Body Ratio	81.48 %	90.06 %
Backlight Source	W-LED	W-LED
sRGB	95 %
NTSC 1953	72 %	72 %
Screen Brightness	250 cd/m²	250 cd/m²
Static Screen Contrast	1000 : 1	1000 : 1
Dynamic Screen Contrast	5000000 : 1
Screen Horizontal Viewing Angle	178 °	178 °
Screen Vertical Viewing Angle	178 °	178 °
Screen Input Lag	20 ms
Display Minimum Response Time	8 ms	4 ms
Display Average Response Time	14 ms	8 ms
Display Maximum Response Time	20 ms
Display Coating	Anti-glare/Matte	Anti-glare/Matte (3H)
3D	No	No
Size, weight, color
Case Depth	2.01 in 5.1 cm 51 mm 0.17 ft	2.12 in 5.4 cm 53.8 mm 0.18 ft
Case Weight	4.19 kg 9 lbs	3.3 kg 7 lbs
Case Width with Stand	21.42 in 54.4 cm 544 mm 1.78 ft	21.17 in 53.8 cm 537.8 mm 1.76 ft
Case Height with Stand	18.5 in 47 cm 469.9 mm 1.54 ft	16.25 in 41.3 cm 412.8 mm 1.35 ft
Case Depth with Stand	9.56 in 24.3 cm 242.9 mm 0.8 ft	6.02 in 15.3 cm 152.8 mm 0.5 ft
Case Weight with Stand	6.4 kg 14 lbs	4.1 kg 9 lbs
Case Color	Black	Black, Silver
Hardware
Built-in Camera	No	No
Connectivity	1 x DisplayPort 1.2 1 x DVI-D Dual Link 1 x D-sub 2 x USB 2.0 (downstream) 1 x USB 2.0 (upstream)	2 x HDMI 1.4 1 x 3.5 mm Audio Out
Audio
Features
Cool Features	DDC/CI HDCP (High-bandwidth Digital Content Protection)	Flicker-free technology Low Blue Light 3-sided bezeless design AMD FreeSync technology
Extra Features	Security lock slot	Anti-theft stand lock slot - Kensington S2421HN - silver S2421NX - black
Ergonomics
Case Width	21.42 in 54.4 cm 544 mm 1.78 ft	21.17 in 53.8 cm 537.8 mm 1.76 ft
Case Height	12.95 in 32.9 cm 329 mm 1.08 ft	12.7 in 32.3 cm 322.6 mm 1.06 ft
Vesa Mount Support	Yes	Yes
VESA Interface Standard Size	100 x 100	100 x 100
Removable VESA Stand	Yes	Yes
Height Adjustment	Yes	No
Height Adjustment Range	150 mm 15 cm 5.9055 in 0.4921 ft
Landscape or Portrait Pivot Support	Yes	No
Left Pivot	0 °
Right Pivot	90 °
Left or Right Swivel Support	Yes	No
Left Swivel	180 °
Right Swivel	180 °
Forward and Backward Tilt Support	Yes	Yes
Forward Tilt	5 °	5 °
Backward Tilt	30 °	21 °
Frequency and Interpolation
Vertical Digital Frequency	50 Hz - 76 Hz	48 Hz - 75 Hz
Horizontal Digital Frequency	24 kHz - 94 kHz	30 kHz - 83 kHz
Screen Interpolation Measurement Unit		NULL
Accessories
Extras	D-sub cable DisplayPort cable USB 2.0 upstream cable	HDMI cable
Certificates and Standards
Licenses	BSMI C-Tick CB CCC CE CECP CEL Grade 1 EAC ENERGY STAR EPA Epeat Gold/Silver (market dependent) FCC Class B ICE ISC KC KCC NOM PSB SEPA TCO EDGE TÜV/S VCCI-B WHQL (Windows 8; Windows 7)	ENERGY STAR 8.0 EPEAT RoHS TCO Certified TUV Flicker Free TUV Low Blue Light
Usage and Storage Requirements
Safe Operating Temperature Level	5 °C - 35 °C 41 °F - 95 °F	0 °C - 40 °C 32 °F - 104 °F
Safe Operating Humidity Level	20 % - 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	5000
Max Storage Altitude	12192	12192

HP Z23i

Dell S2421HN