27" HP X27q
vs
27" Dell S2721D

For the average response rate, the HP X27q scores 8.9 ms, which is faster than the Dell S2721D . For the extremely fast frame rates, the HP X27q has better maximum refresh rate of 165 Hz that allows smoother gameplay. HP X27q has lower total input lag than Dell S2721D . To compensate for graphically demanding games, the HP X27q has better low end adaptive refresh rate of 20 Hz that can adapt to more lower frame rate drops. For graphics color quality, the HP X27q has a better color depth of 10 -bit, resulting in smoother gradients and more accurate colors. The minimum response rate of HP X27q is 3.2 ms, which is 102 % faster than the Dell S2721D . The HP X27q is newer than Dell S2721D . The brightness of HP X27q is better than Dell S2721D by 17 %.

27" HP X27q

With the AMD FreeSync support, this monitor is compatible with both AMD and NVIDIA graphics cards. The HP X27q is a relatively new monitor. The monitor has a VESA mount. The HP X27q has the Display Port and this is essential for NVIDIA cards to work with AMD FreeSync. For graphics color quality, the HP X27q has an excellent color depth of 10 -bit, resulting in smoother gradients and more accurate colors. To compensate for graphically demanding games, the HP X27q has a very good low end adaptive refresh rate of 20 Hz that can adapt to more lower frame rate drops. For the extremely fast frame rates, the HP X27q has a maximum refresh rate of 165 Hz that allows smoother gameplay. The monitor panel has good viewing angles and offers better contrast and colors than TN panels. The brightness of HP X27q is significantly better than other monitors. In terms of pixel density, the HP X27q has an excellent density of 108 pixels-per-inch, resulting in sharper text and picture quality. The monitor has an unimpressive contrast ratio of 1085 : 1. For the average response rate, the HP X27q scores 8.9 ms, which can cause motion blurring due to ineffective synchronization with the high refresh rate. The minimum response rate of HP X27q is 3.2 ms, which is can cause ghosting effects. HP X27q has a total input lag of 19.4 ms, which is bad among the competition.

27" Dell S2721D

In terms of pixel density, the Dell S2721D has an excellent density of 109 pixels-per-inch, resulting in sharper text and picture quality. For graphics color quality, the Dell S2721D has an excellent color depth of 8 -bit, resulting in smoother gradients and more accurate colors. The monitor panel has good viewing angles and offers better contrast and colors than TN panels. The Dell S2721D has the Display Port and this is essential for NVIDIA cards to work with AMD FreeSync. The monitor has a VESA mount. With the AMD FreeSync support, this monitor is compatible with both AMD and NVIDIA graphics cards. The Dell S2721D is a relatively new monitor. The brightness of Dell S2721D is lower than other monitors. The minimum response rate of Dell S2721D is 9.8 ms, which is can cause ghosting effects. The monitor has an unimpressive contrast ratio of 1015 : 1. The Dell S2721D has a maximum refresh rate of 75 Hz and this may be too low for the extremely fast frame rates in competitive games. Graphically demanding games may cause frame drops outside the adative refresh rate of 48 Hz. Dell S2721D has a total input lag of 27.9 ms, which is bad among the competition. For the average response rate, the Dell S2721D scores 17.4 ms, which can cause motion blurring due to ineffective synchronization with the high refresh rate.

Design

	27" HP X27q	27" Dell S2721D
Curve Radius	Not Curved	Not Curved
Curved	No	No
Height Adjustment	3.9" (10.0 cm)	0.0" (0.0 cm)
Size	27"	27"
Swivel Range	No swivel	No swivel
Tilt Range	-20° to 5°	-21° to 5°
Wall Mount	VESA 100x100	VESA 100x100

Features

	27" HP X27q	27" Dell S2721D
Multiple Input Display	No	No
RGB Illumination	No	No
Speakers	No	Yes

Inputs

	27" HP X27q	27" Dell S2721D
Aspect Ratio	16:9	16:9
DVI	No	No
DisplayPort	1 (DP 1.4)	1 (DP 1.2)
HDMI	1 (HDMI 2.0)	2 (HDMI 1.4)
Megapixels	3.7 MP	3.7 MP
Mini DisplayPort	No	No
Native Resolution	2560 x 1440	6.9 ms
Native Resolution @ 60Hz	9.0 ms	8.6 ms
Pixel Density	108 PPI	109 PPI
Screen Area	313 in²	310 in²
VGA	No	No

Motion

	27" HP X27q	27" Dell S2721D
Flicker-Free	Yes	Yes
FreeSync	Yes	Yes
G-SYNC	Compatible (Tested)	Compatible (Tested)
Max Refresh Rate	165 Hz	75 Hz
Overshoot Error	10.4%	0.0%
PWM Dimming Frequency	0 Hz	0 Hz
Rise / Fall Time	3.2 ms	9.8 ms
Total Response Time	8.9 ms	17.4 ms
VRR Maximum	165 Hz	75 Hz
VRR Minimum	< 20 Hz	48 Hz
VRR Supported Connectors	DisplayPort, HDMI	DisplayPort, HDMI
Variable Refresh Rate	Yes	FreeSync

Picture Quality

	27" HP X27q	27" Dell S2721D
50% DSE	0.134%	0.090%
50% Std. Dev.	2.939%	2.217%
Adobe RGB In ICtCp	82.6%	82.3%
Adobe RGB Picture Mode	Custom RGB	Custom Color
Backlight	Edge	Edge
Black Level Raise From Above	29°	70°
Black Level Raise From Below	22°	70°
Black Level Raise From Left	70°	70°
Black Level Raise From Right	70°	30°
Brightness Loss From Above	38°	58°
Brightness Loss From Below	39°	54°
Brightness Loss From Left	48°	52°
Brightness Loss From Right	46°	51°
Calculated Direct Reflections	2.1%	0.5%
Color Depth	10 Bit	8 Bit
Color Shift From Above	33°	60°
Color Shift From Below	26°	64°
Color Shift From Left	48°	54°
Color Shift From Right	49°	63°
Color Washout From Above	31°	59°
Color Washout From Below	32°	50°
Color Washout From Left	46°	46°
Color Washout From Right	42°	42°
Contrast Setting	100	75
Contrast With Local Dimming	704 : 1	N/A
DCI-P3 In ICtCp	85.4%	N/A
Gamma Setting	No Gamma Setting	No Gamma Setting
Gamma Shift From Above	31°	70°
Gamma Shift From Below	29°	67°
Gamma Shift From Left	63°	44°
Gamma Shift From Right	58°	39°
Indirect Reflections	2.9%	3.8%
Local Dimming	Yes	No
Native Contrast	1,085 : 1	1,015 : 1
Native Std. Dev.	2.009%	1.489%
Picture Mode	Gaming	Custom Color
Pixel Type	IPS	IPS
Rec. 2020 In ICtCp	63.0%	N/A
Rec. 2020 Picture Mode	HDR On	No HDR
Screen Finish	Matte	Matte
Std. Dev. w/ L.D.	5.325%	N/A
Total Reflections	5.0%	4.3%
Wide Color Gamut	Yes	N/A
sRGB In ICtCp	97.3%	97.4%
sRGB Picture Mode	Custom RGB	Custom Color