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Response, Input Lag, Viewing Angles and Uniformity

To compare the X34 OLED’s performance, I had to cover a large span of time to come up with five other monitors. They’re all 34-inch WQHD OLED ultra-wides with 240 Hz refresh rates, except for the AOC AG346UCD, which tops out at 175 Hz. The rest are Alienware’s AW2435DW, Corsair’s 34WQHD240-C, Gigabyte’s MO34WQC2, and Asus’ PG34WCDM.

Pixel Response and Input Lag

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Acer Predator X34 OLED — (Image credit: Tom's Hardware)

The response test went as expected, with the 240 Hz screens all drawing a full white field in 4ms and the 175 Hz AOC taking 6ms. That one will show slight motion blur while the others will not. The X34 OLED has perfect motion resolution at rates above 180fps.

The input lag score is a standout that puts the X34 OLED up with the fastest panels I’ve ever tested. It’s the class leader here at just 16ms of total lag. It is more than worthy of professional competition where players’ reflexes are extremely fast. It is a weapon for sure.

Test Takeaway: The X34 OLED is the fastest 240 Hz ultra-wide OLED I’ve tested to date. It keeps up with other monitors running at higher rates and easily leads the 34-inch WQHD class. You can pay more for more speed, but then you’d give up the 21:9 curved format for a 16:9 flat panel.

Viewing Angles

The photos I took of the X34 OLED are as close to perfect as I’ve seen from any OLED. There is no visible change in color, brightness, or gamma at 45 degrees to the sides. The top view has a bit lighter gamma and a green shift, not unusual. In the horizontal plane, the X34 OLED’s image looks the same from all angles. It doesn’t get better than this.

Screen Uniformity

To learn how we measure screen uniformity, click here.

As a category, OLED monitors are the best performers in my uniformity test. I have yet to encounter a bad one. The X34 OLED has an impressively low 4.60% deviation, which is exceptional among monitors in general but about average for OLEDs. You won’t find any glow or hotspots here.

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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.