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What we think
The PerfectRec monitor team Learn more
Updated April 11, 2024·
Choosing the Acer X27U (W-OLED) means investing more for an exceptional gaming experience with its high contrast and minimal ghosting, making it ideal for competitive gaming. However, it's not the best for productivity due to lower resolution and its peak brightness could be better for HDR media. On the other hand, the Dell S2721QS (IPS) offers a sharper image with its higher resolution at a lower price, perfect for productivity and casual gaming, but it's not suited for competitive gaming or HDR content due to its lower contrast and responsiveness. The choice depends on whether competitive gaming or productivity and cost-effectiveness are your priorities. Give Feedback
this description is based on the product variant with some specs and product variant with some specs. At the time of writing, the variant with some specs cost some dollars and the variant with some specs cost some dollars.
Advantages of the Acer X27U (W-OLED)
- Best in class for casual gaming
- Very good for competitive gaming
- Good for media consumption
- Very good refresh rate
- Best in class contrast
- Best in class response time
Advantages of the Dell S2721QS (IPS)
- Good for productivity
- Very good text clarity
- Very good image clarity
Key differences
Casual Gaming
9.5
5.9
2560 x 1440
RESOLUTION
3840 x 2160
240Hz
REFRESH RATE
60Hz
Inf:1
NATIVE CONTRAST
1221:1
211 nits
SDR PEAK BRIGHTNESS
373 nits
603 nits
HDR PEAK BRIGHTNESS
386 nits
95.5 %
DCI-P3 COLOR GAMUT
85.2 %
Matte
COATING
Matte
The Acer X27U (W-OLED) is best in class for casual gaming, while the Dell S2721QS (IPS) is poor.
Competitive Gaming
8.8
4.9
240Hz
REFRESH RATE
60Hz
1.4 ms
TOTAL RESPONSE TIME
14.5 ms
20 - 240 Hz
VARIABLE REFRESH RATE
40 - 60 Hz
No
STROBING / BFI
No
211 nits
SDR PEAK BRIGHTNESS
373 nits
The Acer X27U (W-OLED) is very good for competitive gaming, while the Dell S2721QS (IPS) is poor.
Productivity
5.8
7.9
2560 x 1440
RESOLUTION
3840 x 2160
111 PPI
PIXELS PER INCH
164 PPI
Yes
ADJUSTABLE STAND
Yes
Matte
COATING
Matte
The Dell S2721QS (IPS) is good for productivity, while the Acer X27U (W-OLED) is poor.
Media Consumption
7.5
6.7
2560 x 1440
RESOLUTION
3840 x 2160
Inf:1
NATIVE CONTRAST
1221:1
211 nits
SDR PEAK BRIGHTNESS
373 nits
603 nits
HDR PEAK BRIGHTNESS
386 nits
Matte
COATING
Matte
The Acer X27U (W-OLED) is good for media consumption, while the Dell S2721QS (IPS) is only fair.
Cost
$1,000
$230
$0
$500
$1,000
$1,500
$2,000
The Acer X27U (W-OLED) has a price of $1,000 and the Dell S2721QS (IPS) costs $230.
HDR Gaming and Media Consumption
Yes
No
The Acer X27U (W-OLED) is suitable for HDR gaming and media consumption while the Dell S2721QS (IPS) is not suitable for HDR gaming and media consumption.
Key similarities
Digital Photo Editing
Yes
Yes
Both the Acer X27U (W-OLED) and Dell S2721QS (IPS) are suitable for digital photo editing.
HDR Video Editing and Color Grading
No
No
Both the Acer X27U (W-OLED) and Dell S2721QS (IPS) are not suitable for HDR video editing and color grading.
Print Photo Editing
No
No
Both the Acer X27U (W-OLED) and Dell S2721QS (IPS) are not suitable for print photo editing.
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We’re constantly working to improve.
How the Acer X27U (W-OLED) and the Dell S2721QS (IPS) compare to other monitors
Spec Comparison
 |  | |
| Acer X27U (W-OLED) | Dell S2721QS (IPS) |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,000 | $230 | ||
Screen Size | |||
Screen Size | 27" | 27" | |
Resolution | |||
Resolution | 2560 x 1440 | 3840 x 2160 | |
Screen Type | |||
Screen Type | OLED | LED | |
Screen Sub-type | |||
Screen Sub-type | W-OLED | IPS | |
Refresh Rate | |||
Refresh Rate | 240Hz | 60Hz | |
COLOR, CONTRAST & BRIGHTNESS | |||
|---|---|---|---|
Native Contrast | |||
Native Contrast | Inf:1 | 1221:1 | |
SDR Peak Brightness | |||
SDR Peak Brightness | 211 nits | 373 nits | |
HDR Peak Brightness | |||
HDR Peak Brightness | 603 nits | 386 nits | |
Suitable for HDR Gaming and Media Consumption | |||
Suitable for HDR Gaming and Media Consumption | Yes | No | |
sRGB Color Gamut | |||
sRGB Color Gamut | 100 % | 100 % | |
MOTION CHARACTERISTICS | |||
|---|---|---|---|
Total Response Time | |||
Total Response Time | 1.4 ms | 14.5 ms | |
Variable Refresh Rate | |||
Variable Refresh Rate | 20 - 240 Hz | 40 - 60 Hz | |
Strobing / BFI | |||
Strobing / BFI | No | No | |
Persistence Blur Score | |||
Persistence Blur Score | 8/10 | 5/10 | |
Ghosting Score | |||
Ghosting Score | 9.5/10 | 6/10 | |
TEXT & IMAGE CLARITY | |||
|---|---|---|---|
Pixels Per Inch | |||
Pixels Per Inch | 111 PPI | 164 PPI | |
Coating | |||
Coating | Matte | Matte | |
Text Clarity Score | |||
Text Clarity Score | 6.7/10 | 8.1/10 | |
Image Clarity Score | |||
Image Clarity Score | 7.2/10 | 8.1/10 | |
PORTS & CONNECTIVITY | |||
|---|---|---|---|
HDMI 1.4 Ports | |||
HDMI 1.4 Ports | 0 | 0 | |
HDMI 2.0 Ports | |||
HDMI 2.0 Ports | 2 | 2 | |
HDMI 2.1 Ports | |||
HDMI 2.1 Ports | 0 | 0 | |
Micro HDMI Ports | |||
Micro HDMI Ports | 0 | 0 | |
DisplayPort 1.2 Ports | |||
DisplayPort 1.2 Ports | 0 | 1 | |
Shopping
Dell S2721QS (IPS)
See more
Dig into reviews and images
Tom's Hardware
Scharon Harding | September 2021
"The Dell S2721QS 4K monitor brings IPS-level colors and some handy features, like a versatile stand with height adjustments and picture-in-picture for connecting dual systems. But don’t get it for HDR."
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Why trust us
This information was produced and vetted by the PerfectRec monitors team. We are a product research and recommendation organization that meticulously reviews and evaluates the latest monitor information and makes it digestible for you.
By the numbers
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About the monitor team
Joe Golden, Ph.D
CEO and Monitors Editor
Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.
Jason Lew
Staff Expert & Software Engineer
Jason is a staff expert and software engineer that has been making laptop recommendations for 7 years and moderates one of the largest laptop subreddits.
Chandradeep Chowdhury
Staff Expert & Software Engineer
Chandradeep is a staff expert and software engineer and expert in televisions and monitors. He’s been making monitor recommendations for ten years.
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