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 exceptional gaming performance with high refresh rates and deep contrast levels are your priority, the AOC monitor is an excellent choice, particularly for immersive and HDR gaming. However, it's less suited for tasks requiring accurate colors for professional photo editing. On the other hand, the Dell monitor, while more affordable, offers good color accuracy for casual content creation and is a solid choice for everyday productivity and media consumption. It's not ideal for competitive gaming due to a lower refresh rate and response time, nor for HDR content, as it does not support high brightness levels like the AOC. Consider what you'll use the monitor for most, and choose accordingly. 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 AG456UCZD (W-OLED)
- Best in class for casual gaming
- Very good refresh rate
- Best in class contrast
- Best in class response time
Advantages of the Dell S2721DS (IPS)
- Good text clarity
- Good image clarity
Key differences
Casual Gaming
9.6
5.8
3440 x 1440
RESOLUTION
2560 x 1440
240Hz
REFRESH RATE
75Hz
Inf:1
NATIVE CONTRAST
1015:1
200 nits
SDR PEAK BRIGHTNESS
334 nits
Unknown
HDR PEAK BRIGHTNESS
N/A
98.5 %
DCI-P3 COLOR GAMUT
N/A
Matte
COATING
Matte
The AOC AG456UCZD (W-OLED) is best in class for casual gaming, while the Dell S2721DS (IPS) is poor.
Competitive Gaming
6.0
5.0
240Hz
REFRESH RATE
75Hz
0.0 ms
TOTAL RESPONSE TIME
17.4 ms
48 - 240 Hz
VARIABLE REFRESH RATE
48 - 75 Hz
No
STROBING / BFI
No
200 nits
SDR PEAK BRIGHTNESS
334 nits
The AOC AG456UCZD (W-OLED) is only fair for competitive gaming, while the Dell S2721DS (IPS) is poor.
Productivity
3.8
5.9
3440 x 1440
RESOLUTION
2560 x 1440
83 PPI
PIXELS PER INCH
109 PPI
Yes
ADJUSTABLE STAND
No
Matte
COATING
Matte
The Dell S2721DS (IPS) and AOC AG456UCZD (W-OLED) are both poor for productivity, though the Dell S2721DS (IPS) is somewhat better.
Cost
$1,400
$309
$0
$500
$1,000
$1,500
$2,000
$2,500
The AOC AG456UCZD (W-OLED) has a price of $1,400 and the Dell S2721DS (IPS) costs $309.
HDR Gaming and Media Consumption
Yes
No
The AOC AG456UCZD (W-OLED) is suitable for HDR gaming and media consumption while the Dell S2721DS (IPS) is not suitable for HDR gaming and media consumption.
Digital Photo Editing
Yes
No
The AOC AG456UCZD (W-OLED) is suitable for digital photo editing while the Dell S2721DS (IPS) is not suitable for digital photo editing.
Print Photo Editing
Yes
No
The AOC AG456UCZD (W-OLED) is suitable for print photo editing while the Dell S2721DS (IPS) is not suitable for print photo editing.
Key similarities
Media Consumption
5.9
5.9
3440 x 1440
RESOLUTION
2560 x 1440
Inf:1
NATIVE CONTRAST
1015:1
200 nits
SDR PEAK BRIGHTNESS
334 nits
Unknown
HDR PEAK BRIGHTNESS
N/A
Matte
COATING
Matte
The Dell S2721DS (IPS) and AOC AG456UCZD (W-OLED) are both poor for media consumption.
HDR Video Editing and Color Grading
No
No
Both the AOC AG456UCZD (W-OLED) and Dell S2721DS (IPS) are not suitable for HDR video editing and color grading.
Give feedback
We’re constantly working to improve.
How the AOC AG456UCZD (W-OLED) and the Dell S2721DS (IPS) compare to other monitors
Spec Comparison
 |  | |
| AOC AG456UCZD (W-OLED) | Dell S2721DS (IPS) |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,400 | $309 | ||
Screen Size | |||
Screen Size | 44.5" | 27" | |
Resolution | |||
Resolution | 3440 x 1440 | 2560 x 1440 | |
Screen Type | |||
Screen Type | OLED | LED | |
Screen Sub-type | |||
Screen Sub-type | W-OLED | IPS | |
Refresh Rate | |||
Refresh Rate | 240Hz | 75Hz | |
COLOR, CONTRAST & BRIGHTNESS | |||
|---|---|---|---|
Native Contrast | |||
Native Contrast | Inf:1 | 1015:1 | |
SDR Peak Brightness | |||
SDR Peak Brightness | 200 nits | 334 nits | |
HDR Peak Brightness | |||
HDR Peak Brightness | Unknown | N/A | |
Suitable for HDR Gaming and Media Consumption | |||
Suitable for HDR Gaming and Media Consumption | Yes | No | |
sRGB Color Gamut | |||
sRGB Color Gamut | 100 % | 98.6 % | |
MOTION CHARACTERISTICS | |||
|---|---|---|---|
Total Response Time | |||
Total Response Time | 0.03 ms | 17.4 ms | |
Variable Refresh Rate | |||
Variable Refresh Rate | 48 - 240 Hz | 48 - 75 Hz | |
Strobing / BFI | |||
Strobing / BFI | No | No | |
Persistence Blur Score | |||
Persistence Blur Score | 8/10 | 5.2/10 | |
Ghosting Score | |||
Ghosting Score | 10/10 | 6/10 | |
TEXT & IMAGE CLARITY | |||
|---|---|---|---|
Pixels Per Inch | |||
Pixels Per Inch | 83 PPI | 109 PPI | |
Coating | |||
Coating | Matte | Matte | |
Text Clarity Score | |||
Text Clarity Score | 3.8/10 | 7/10 | |
Image Clarity Score | |||
Image Clarity Score | 4.9/10 | 7/10 | |
PORTS & CONNECTIVITY | |||
|---|---|---|---|
HDMI 1.4 Ports | |||
HDMI 1.4 Ports | 0 | 1 | |
HDMI 2.0 Ports | |||
HDMI 2.0 Ports | 0 | 0 | |
HDMI 2.1 Ports | |||
HDMI 2.1 Ports | 3 | 0 | |
Micro HDMI Ports | |||
Micro HDMI Ports | 0 | 0 | |
DisplayPort 1.2 Ports | |||
DisplayPort 1.2 Ports | 0 | 1 | |
Shopping
Dell S2721DS (IPS)
See more
Dig into reviews and images
Tech Radar
Ural Garrett | November 2021
"General users or casual PC gamers in need of a solid and affordable QHD monitor with a few extras may walk away satisfied with the Dell S2721D."
Give feedback
We're constantly perfecting our model
More comparisons for you
Compare AOC AG456UCZD (W-OLED) vs. ViewSonic XG341C-2K (VA Mini LED)
VS
Compare AOC AG456UCZD (W-OLED) vs. Asus PG34WCDM (W-OLED)
VS
Compare AOC AG456UCZD (W-OLED) vs. Samsung Odyssey OLED G8 G85SB (QD-OLED)
VS
Compare Dell S2721DS (IPS) vs. Dell S2721DGF (IPS)
VS
Compare Dell S2721DS (IPS) vs. Dell S2522HG (IPS)
VS
Compare Dell S2721DS (IPS) vs. Dell S3422DWG (VA)
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
107,600
Recommendations made
16,140
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
