The pair both use a 1500R curved Fast VA panel running at WQHD resolution (3440 x 1440), and both carry DisplayHDR 400 certification with a peak brightness of 450 nits. Where they split is speed. The CU34G4CA tops out at 180Hz with 0.5ms MPRT, connecting via two HDMI 2.0 ports and a single DisplayPort 1.4. The CU34G4ZCA runs natively at 240Hz, with headroom to overclock to 250Hz, dropping MPRT to 0.3ms and swapping in two HDMI 2.1 ports for the extra bandwidth. Both are rated for response times as low as 1ms GtG.
What’s new for this pairing, and what AOC is leaning on to explain the crossover into work setups, is the addition of 90W USB-C Power Delivery and a hardware KVM switch. That means a single USB-C cable can carry video, data and enough power to charge a laptop, while the KVM switch lets one keyboard and mouse control two separate machines, a work laptop and a gaming PC, say, without unplugging anything. There’s a USB hub thrown in too, with two USB 3.2 Gen 1 ports for peripherals.
It’s a pitch we’ve seen before on business-leaning monitors, just not usually alongside a 1500R curve and a triple-digit refresh rate. AOC’s own framing is that the panel comes first as a gaming display, with the productivity tools sitting on top rather than the other way round. Ergonomics get the usual attention, with 130mm of height adjustment plus tilt (-3.5° to 21.5°) and swivel (-20° to +20°) on both models. Flicker-free backlighting and a low blue light mode are included for longer sessions, and AOC’s G-Menu software handles on-screen settings and preset switching. Adaptive-Sync is also supported across both panels to keep tearing and stutter in check.
Both monitors sit within AOC’s wider G4 line, which the company describes as its mainstream gaming range, spanning 24 inches up to these 34-inch ultrawides across a mix of resolutions and panel types.
The CU34G4CA and CU34G4ZCA arrive in August 2026, priced at £289.99 and £329.99 respectively for the UK.
