A comparison of specs, key information, reviews, and best pricing from top retailers
Last updated -- hours ago | Report incorrect information
Company ProductName Specs
Company ProductName Specs
What we think
The PerfectRec monitor team Learn more
Updated April 11, 2024·
If high-performance gaming is your priority and you're willing to invest at a premium price, the AOC AG276QZD with its OLED panel and higher refresh rate offers superior contrast and responsiveness, ideal for fast-paced games. However, for tasks requiring consistent image clarity and if you prefer higher resolution for productivity or media consumption, the Dell S2721QS, with its 4K resolution and excellent text quality, is more budget-friendly. The Dell falls short for competitive gaming though, due to its lower refresh rate. Neither monitor is the best for HDR video editing, but the AOC would fare better for HDR gaming and media. 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 AOC AG276QZD (W-OLED)
- Best in class for casual gaming
- Best in class 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
9.7
5.9
2560 x 1440
RESOLUTION
3840 x 2160
240Hz
REFRESH RATE
60Hz
Inf:1
NATIVE CONTRAST
1221:1
284 nits
SDR PEAK BRIGHTNESS
373 nits
379 nits
HDR PEAK BRIGHTNESS
386 nits
96.0 %
DCI-P3 COLOR GAMUT
85.2 %
Matte
COATING
Matte
The AOC AG276QZD (W-OLED) is best in class for casual gaming, while the Dell S2721QS (IPS) is poor.
Competitive Gaming
9.6
4.9
240Hz
REFRESH RATE
60Hz
0.3 ms
TOTAL RESPONSE TIME
14.5 ms
20 - 240 Hz
VARIABLE REFRESH RATE
40 - 60 Hz
No
STROBING / BFI
No
284 nits
SDR PEAK BRIGHTNESS
373 nits
The AOC AG276QZD (W-OLED) is best in class for competitive gaming, while the Dell S2721QS (IPS) is poor.
Productivity
5.7
7.9
2560 x 1440
RESOLUTION
3840 x 2160
108 PPI
PIXELS PER INCH
164 PPI
Yes
ADJUSTABLE STAND
Yes
Matte
COATING
Matte
The Dell S2721QS (IPS) is good for productivity, while the AOC AG276QZD (W-OLED) is poor.
Media Consumption
7.8
6.7
2560 x 1440
RESOLUTION
3840 x 2160
Inf:1
NATIVE CONTRAST
1221:1
284 nits
SDR PEAK BRIGHTNESS
373 nits
379 nits
HDR PEAK BRIGHTNESS
386 nits
Matte
COATING
Matte
The AOC AG276QZD (W-OLED) is good for media consumption, while the Dell S2721QS (IPS) is only fair.
Cost
$700
$230
$0
$200
$400
$600
$800
$1,000
$1,200
The AOC AG276QZD (W-OLED) has a price of $700 and the Dell S2721QS (IPS) costs $230.
HDR Gaming and Media Consumption
Yes
No
The AOC AG276QZD (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 AOC AG276QZD (W-OLED) and Dell S2721QS (IPS) are suitable for digital photo editing.
HDR Video Editing and Color Grading
No
No
Both the AOC AG276QZD (W-OLED) and Dell S2721QS (IPS) are not suitable for HDR video editing and color grading.
Print Photo Editing
No
No
Both the AOC AG276QZD (W-OLED) and Dell S2721QS (IPS) are not suitable for print photo editing.
Give feedback
We’re constantly working to improve.
How the AOC AG276QZD (W-OLED) and the Dell S2721QS (IPS) compare to other monitors
Spec Comparison
 |  | |
| AOC AG276QZD (W-OLED) | Dell S2721QS (IPS) |
GENERAL | |||
|---|---|---|---|
| Price | |||
$700 | $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 | 284 nits | 373 nits | |
HDR Peak Brightness | |||
HDR Peak Brightness | 379 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 | 0.3 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 | 9.9/10 | 6/10 | |
TEXT & IMAGE CLARITY | |||
|---|---|---|---|
Pixels Per Inch | |||
Pixels Per Inch | 108 PPI | 164 PPI | |
Coating | |||
Coating | Matte | Matte | |
Text Clarity Score | |||
Text Clarity Score | 6.6/10 | 8.1/10 | |
Image Clarity Score | |||
Image Clarity Score | 7/10 | 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."
Give feedback
We're constantly perfecting our model
More comparisons for you
Compare AOC AG276QZD (W-OLED) vs. Acer X34V (QD-OLED)
VS
Compare AOC AG276QZD (W-OLED) vs. LG 27GS95QE (W-OLED)
VS
Compare AOC AG276QZD (W-OLED) vs. Pixio PX277 OLED Max (W-OLED)
VS
Compare Dell S2721QS (IPS) vs. MSI G273QPF (IPS)
VS
Compare Dell S2721QS (IPS) vs. ViewSonic XG2431 (IPS)
VS
Compare Dell S2721QS (IPS) vs. KTC H27T22 (IPS)
VS
FAQs
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
210
Monitors evaluated
10,500
Monitors stats compiled
15
Proprietary Monitors ratings developed
107,300
Recommendations made
16,095
Consumer hours saved
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.
Featured in
