AOC adds 250 Hz overclocking to its 34-inch G4 ultrawide range
AGON by AOC has expanded its G4 gaming monitor lineup with two 34-inch ultrawide models. The AOC GAMING CU34G4CA supports a 180 Hz refresh rate, while the CU34G4ZCA operates at 240 Hz and can be overclocked to 250 Hz.
Both monitors use a curved Fast VA panel with a 3440 × 1440 resolution, 21:9 aspect ratio and 1500R curvature. AOC lists a typical brightness of 450 nits, a 2500:1 static contrast ratio and VESA DisplayHDR 400 certification. The panels also support Adaptive-Sync and have a rated 1 ms GtG response time.
CU34G4ZCA adds 250 Hz and HDMI 2.1
The CU34G4CA offers a 180 Hz refresh rate and a claimed 0.5 ms MPRT response time. Its display inputs include one DisplayPort 1.4 connector and two HDMI 2.0 ports. It covers 100% of the sRGB color space and around 92% of DCI-P3.
The CU34G4ZCA increases the native refresh rate to 240 Hz, with a 250 Hz overclocking option and a claimed 0.3 ms MPRT response time. This model replaces HDMI 2.0 with two HDMI 2.1 FRL ports and increases DCI-P3 coverage to around 95%.
Both monitors include a USB-C connector that supports display input, data transfer and up to 90 W Power Delivery. A built-in KVM switch allows one keyboard and mouse to control a gaming desktop and a connected laptop. The integrated hub provides two USB 3.2 Gen 1 Type-A ports.
UK pricing starts at £289.99
The included stand supports 130 mm of height adjustment, tilt from -3.5 to 21.5 degrees and swivel from -20 to 20 degrees. Other features include a 100 × 100 mm VESA mount, a 3.5 mm audio output, Flicker-Free technology, Low Blue Mode and support for AOC G-Menu software.
AOC lists UK prices of £289.99 for the CU34G4CA and £329.99 for the CU34G4ZCA, with availability planned for August 2026. The 250 Hz CU34G4ZCA is expected in August, while the 180 Hz CU34G4CA is scheduled for September.
| AOC GAMING CU34G4CA and CU34G4ZCA specifications | ||
|---|---|---|
| VideoCardz.com | AOC GAMING CU34G4CA | AOC GAMING CU34G4ZCA |
| Picture |  |  |
| Panel | 34-inch Fast VA, Edge LED | 34-inch Fast VA, Edge LED |
| Resolution | 3440 × 1440, 21:9 | 3440 × 1440, 21:9 |
| Curvature | 1500R | 1500R |
| Refresh rate | 180 Hz | 240 Hz, 250 Hz OC |
| Response time | 1 ms GtG, 0.5 ms MPRT | 1 ms GtG, 0.3 ms MPRT |
| Brightness | 450 nits | 450 nits |
| Contrast ratio | 2500:1 | 2500:1 |
| Color depth | 8-bit, 16.7 million colors | 8-bit, 16.7 million colors |
| Color coverage | 100% sRGB, 92% DCI-P3, 89% Adobe RGB | 100% sRGB, 95% DCI-P3, 89% Adobe RGB |
| HDR | HDR10, VESA DisplayHDR 400 | HDR10, VESA DisplayHDR 400 |
| Adaptive sync | Adaptive-Sync | Adaptive-Sync |
| Display inputs | 1× DisplayPort 1.4, 2× HDMI 2.0 | 1× DisplayPort 1.4, 2× HDMI 2.1 FRL |
| USB | 1× USB-C with 90 W PD, 2× USB-A 3.2 Gen 1 | 1× USB-C with 90 W PD, 2× USB-A 3.2 Gen 1 |
| KVM switch | Yes | Yes |
| Audio | 3.5 mm output | 3.5 mm output |
| Stand adjustment | 130 mm height, tilt and swivel | 130 mm height, tilt and swivel |
| VESA mount | 100 × 100 mm | 100 × 100 mm |
| UK price | £289.99 | £329.99 |
