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Response, Input Lag, Viewing Angles and Uniformity

My database contains mainly 240 Hz OLEDs. To compare the AG346UCD’s performance to at least one other 175 Hz model, I had to activate the time machine for the numbers from my review of the Samsung OLED G8 from 2023. The remaining screens are Gigabyte’s MO34WQC2, Corsair’s 34WQHD240-C, Acer’s X34 and AOC’s AG456UCZD.

Pixel Response and Input Lag

Click here to read up on our pixel response and input lag testing procedures.

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AOC Agon Pro AG346UCD — (Image credit: Tom's Hardware)

It’s important to remember that OLED gaming monitors make more of a given refresh rate than an LCD. In addition, the differences between 175 and 240 Hz are small enough that most players won’t see a difference in smoothness or control response. The numbers above demonstrate this. Though the AG346UCD takes 6ms rather than 4ms to draw a full white field, the difference in practice is minute. I could see a tiny hint of blur in test patterns but during actual gameplay, there was no difference.

I also noted no appreciable difference in the total control lag times. The Samsung is an outlier, but it is a bit older than the others. Clearly, paying more for 240 Hz won’t get you a lot more speed. The AG346UCD is on par with the faster screens.

Test Takeaway: While it’s easy to ding the AG346UCD for being *only* 175 Hz, the test results show that doesn’t matter. My visual observation was of very slight blur in moving test patterns but nothing that would affect the gaming feel or experience. You can save a bit of money buying the AG346UCD and get the same performance offered by most 240 Hz screens.

Viewing Angles

I’ve observed slight red tints in some QD-OLEDs at 45 degrees off-center, but the AG346UCD doesn’t have this trait. The side view is identical to the on-center photo in color and luminance. Gamma is also unaffected. The top view is a tad red with a reduced gamma. This is excellent performance.

Screen Uniformity

To learn how we measure screen uniformity, click here.

Also excellent is the AG346UCD’s screen uniformity which is among the best I’ve measured from any monitor. You won’t see any bleed, glow, or hotspots here. It truly doesn’t get better than this.

MORE: Best Gaming Monitors

MORE: How We Test PC Monitors

MORE: How to Buy a PC Monitor

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Christian Eberle is a Contributing Editor for Tom's Hardware US. He's a veteran reviewer of A/V equipment, specializing in monitors. Christian began his obsession with tech when he built his first PC in 1991, a 286 running DOS 3.0 at a blazing 12MHz. In 2006, he undertook training from the Imaging Science Foundation in video calibration and testing and thus started a passion for precise imaging that persists to this day. He is also a professional musician with a degree from the New England Conservatory as a classical bassoonist which he used to good effect as a performer with the West Point Army Band from 1987 to 2013. He enjoys watching movies and listening to high-end audio in his custom-built home theater and can be seen riding trails near his home on a race-ready ICE VTX recumbent trike. Christian enjoys the endless summer in Florida where he lives with his wife and Chihuahua and plays with orchestras around the state.

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4 Comments Comment from the forums

Deflott

I bought this monitor for 590€ and im super happy with it, only thing I'm not used to is when i play game like kcd without brightness setting and there is night I can't see anything :/
Reply
dave.rara66

I'm sure it's a nice monitor, but for the same price you can buy the Dell Alienware AW3423DWF. While it's capped at 165Hz (hardly a noticeable decrease) it has great HDR performance and a better warranty.

Not better as in longer, but better in that they will never make you send in a monitor for repair. They instead ship you a new replacement panel (no deposit required) and you just drop the defective one in the same box and send it back - all prepaid. Best warranty ever (3 years).
Reply
Deflott

dave.rara66 said:
I'm sure it's a nice monitor, but for the same price you can buy the Dell Alienware AW3423DWF. While it's capped at 165Hz (hardly a noticeable decrease) it has great HDR performance and a better warranty.

Not better as in longer, but better in that they will never make you send in a monitor for repair. They instead ship you a new replacement panel (no deposit required) and you just drop the defective one in the same box and send it back - all prepaid. Best warranty ever (3 years).
I bought agon for 590€ while Alienware one you sent cheapest i could find for 786€
Reply
dave.rara66

Deflott said:
I bought agon for 590€ while Alienware one you sent cheapest i could find for 786€
I should have clarified that the prices I'm seeing are in the USA
Reply