The monitor described here is the AOC AGON PRO AG326UD: a 31.5-inch 4K QD-OLED display with a maximum refresh rate of 165Hz. AOC lists it at $579.99 starting price on its US product page, but that price and local stock can change. It is worth considering if you want 4K OLED gaming and your PC or console can use its inputs; buyers prioritizing a 240Hz ceiling should compare it with AOC’s separate, newer AG326UZD2.
Which AOC monitor is this?
The title’s specifications match the AOC AGON PRO AG326UD. AOC lists a 31.5-inch diagonal, 3840 × 2160 UHD resolution, QD-OLED panel and 165Hz maximum refresh rate. “32-inch” is the rounded marketing size, not the listed panel diagonal.
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It is not the same product as the AG326UZD2. AOC announced that separate 31.5-inch 4K QD-OLED model on 21 April 2026, describing it as a 240Hz successor to the original 165Hz AG326UD. The announcement’s specifications and claims apply to the AG326UZD2, not the AG326UD.
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AG326UD versus AG326UZD2
| Specification | AGON PRO AG326UD | AGON PRO AG326UZD2 |
|---|---|---|
| Screen diagonal | 31.5 inches | 31.5 inches |
| Resolution | 3840 × 2160 UHD | 4K UHD |
| Panel | QD-OLED | 4th-generation QD-OLED, per AOC |
| Maximum refresh rate | 165Hz | 240Hz |
| HDR certification | DisplayHDR True Black 400 | DisplayHDR True Black 500, per AOC |
| Response time | 0.03ms GtG, per AOC | 0.03ms GtG, per AOC |
| Notable connections and features | 2 × HDMI 2.1, 1 × DisplayPort 1.4, USB hub and Adaptive Sync | HDMI 2.1, DisplayPort 2.1, USB-C with 65W power delivery, KVM and Multiview, per AOC |
Specifications for the AG326UD come from AOC’s product page; AG326UZD2 figures are from AOC’s announcement. The newer model’s 240Hz ceiling may matter to buyers with a PC able to deliver very high frame rates, but a higher maximum does not by itself establish that every player will benefit.
#1 Best Overall
- 31.5" UHD (3840 x 2160) QD-OLED panel
- High 240Hz refresh rate, ultra-low 0.03ms GtG response time
- 1.07 billion colours (10-bit) with incredible gamut (DCI-P3 99%) & accuracy (ΔE ≤2)
- VESA DisplayHDR True Black 400 certified
- OLED Care 2.0 & MSI Gaming Intelligence AI
What the AG326UD offers for gaming
The combination of 4K resolution and a 165Hz maximum refresh rate makes the AG326UD a high-resolution, high-refresh option on paper. AOC also lists Adaptive Sync, HDMI 2.1 and DisplayPort 1.4. The manufacturer quotes a 0.03ms GtG response time and lists DisplayHDR True Black 400 certification.
Those specifications do not establish real-world image quality, text clarity, motion handling, input lag or gaming performance. No independent test data is available here, so treat the response-time figure and other performance descriptors as manufacturer specifications rather than a verified assessment.
Rank #2
- 3rd QD-OLED Panel – With stunning image quality and fast response time.
- Fastest 0.03ms GtG response time and 165Hz refresh rate.
- QD Premium Color – Ensures the color meets the market standard – Delta E≤2.
- Incredible HDR visual – VESA DisplayHDR True Black 400.
- MSI OLED Care 2.0 – Reduced the risk of OLED burn-in.
Check your setup and the practical details
- Match the input to your device. The AG326UD has two HDMI 2.1 inputs and one DisplayPort 1.4 input. Confirm the outputs on your PC or console and the display mode you intend to use before buying.
- Check what is in the box. AOC lists the inputs, but the available product information does not establish which cables are included. Do not assume you need to buy a cable separately; check the package contents for the exact regional model.
- Compare the features you actually need. If USB-C power delivery, KVM, Multiview or DisplayPort 2.1 are priorities, AOC lists those features for the AG326UZD2, not the AG326UD.
- Review local warranty conditions. AOC’s US page advertises three years of warranty coverage including OLED burn-in, subject to its care instructions. Coverage is market-specific: AOC’s UK OLED catalogue says burn-in coverage is valid in the EU region only. Check the warranty for your country and exact model before purchase.
Price and availability depend on your region
AOC’s US AG326UD page showed a $579.99 starting price and availability in two retail stores when checked for this article. These are US-page snapshots, not a guarantee of current price or stock, and they do not establish availability in other countries. Check AOC’s listing and local retailers for the latest details.
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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsShould you buy the AOC AG326UD?
Consider it if you want a 31.5-inch 4K QD-OLED monitor with a 165Hz maximum refresh rate, and its listed inputs, local price and warranty suit your setup. Compare it with the AG326UZD2 if you specifically want a 240Hz ceiling or the newer model’s listed USB-C, KVM and DisplayPort 2.1 features. Since independent performance testing is not established here, use hands-on reviews and current local pricing before treating the specifications as proof of how it performs or whether it is the best value.
Quick Recap
Best Value
- Immersive 4K Gaming Display: 32-inch 4K (3840 x 2160) QD-OLED gaming monitor with 240 Hz refresh rate and 0.03 ms (GTG) response time for immersive gaming
- Advanced OLED Care Technology: New ASUS OLED Care Pro functions with Neo Proximity Sensor that precisely detects when the user is away, switching to a black screen to reduce the risk of burn-in
- Professional Color Accuracy: VESA DisplayHDR 400 True Black compliance, 99% DCI-P3 gamut, true 10-bit color, and Delta E < 2 color difference for astonishing HDR performance for photo and video editing
- Uniform Brightness Control: Optional uniform brightness setting ensures consistent luminance levels across the entire display
- Intuitive Monitor Management: DisplayWidget Center allows users to access OLED Care functions, as well as adjust monitor settings with a mouse
Rank #4
- QUANTUM DOT OLED - The MSI MPG 321URXW QD-OLED gaming monitor combines 10-bit Quantum Dot color conversion with OLED self-emitting pixels for unrivalled dark levels & an elite response time; An enhanced sub-pixel arrangement improves image sharpness
- 31.5" UHD, 10-BIT COLOR - A Quantum Dot OLED panel displays 1.07 billion colors (10-bit, 99% DCI-P3) with extreme Delta E ≤2 color accuracy; VESA DisplayHDR True Black 400 certified (1500000:1 native contrast ratio) & up to 1000 nits peak brightness
- 240 HZ REFRESH RATE, 0.03MS RESPONSE TIME - A high 240 Hz refresh rate is complemented by an incredibly low 0.03 ms (GtG) response time for an amazing VESA ClearMR 13000 rating; An elite graphene heatsink (fanless) enhances panel durability
- GAMING INTELLIGENCE - MSI GI software features OLED Care 2.0 to help prevent burn-in, AI supported software (Smart Crosshair), Console modes & Game Assistance; KVM 1.0, PiP/PbP supported; Features RGB illumination & a 4-way adjustable stand (VESA 100mm)
- CUTTING-EDGE CONNECTIVITY - PC, Mac, console & laptop interface options (all UHD/240Hz) include DisplayPort 1.4a, HDMI 2.1 CEC ports & USB Type-C with Power Delivery (90W); Includes a USB hub with 1 x USB 2.0 Type-B & 2 x USB 2.0 Type-A ports
Rank #3
- Immersive 4K QD-OLED Display: 32-inch 4K (3840 x 2160) QD-OLED gaming monitor with 240 Hz refresh rate and 0.03 ms (GTG) response time for immersive gaming
- Advanced Heat Management System: Highly efficient custom heatsink, advanced airflow design, and graphene film for better heat management to reduce the risk of burn-in
- Exceptional HDR Performance: VESA DisplayHDR 400 True Black compliance, 99% DCI-P3 gamut, true 10-bit, and Delta E < 2 color difference for astonishing HDR performance
- Uniform Brightness Setting: Optional uniform brightness setting ensures consistent luminance levels across the entire display
- Convenient Monitor Control: DisplayWidget Center allows users to access OLED Care functions, as well as adjust monitor settings with a mouse
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
