4K 240Hz or 1440p 360Hz?

Choose 4K 240Hz for a sharper picture in single-player games, creative work and a larger 32-inch desktop. Choose 1440p 360Hz for competitive play when the PC can sustain very high frame rates. The ASUS ROG Swift PG32UCDP offers dual modes, UHD at 240Hz or Full HD at 480Hz; the ASUS ROG Strix OLED XG27AQDNG is a 26.5-inch QHD QD-OLED rated at 360Hz, listed at £509.00. ASUS was £738.83 on Amazon UK at the time of writing (October 2026). For broader 4K options, see our best 4K gaming monitor guide.

Manufacturer specification: ASUS lists the PG32UCDP dual modes at 4K 240Hz and Full HD 480Hz; ASUS lists the XG27AQDNG at QHD 360Hz.

How much more demanding is 4K 240Hz?

4K, at 3840 by 2160, contains 8,294,400 pixels per frame. 1440p, at 2560 by 1440, contains 3,686,400. The 4K image therefore has 2.25 times as many pixels, or 125% more, for the GPU to render. At their maximum refresh rates, 4K 240Hz can scan 1.99 billion pixel positions each second, while 1440p 360Hz scans 1.33 billion. This rough throughput comparison does not account for compression or panel blanking, but it illustrates the different demands.

Refresh interval tells a separate story. 240Hz presents a refresh every 4.17ms, while 360Hz does so every 2.78ms. The 360Hz screen offers a 1.39ms shorter interval, a 33% reduction. That is relevant to competitive play when the game actually runs beyond 240 fps. 4K's pixel count and larger physical image are more useful in games where landscape detail, fine interface elements and cinematic presentation matter.

The best format also depends on screen size and viewing distance. At 27 inches, 1440p yields roughly 109 pixels per inch; at 32 inches, 4K yields about 138 pixels per inch. Both are sharp at typical desk distance, but 4K text and edges are finer. The ASUS dual-mode panel changes from 4K to 1080p when its user selects 480Hz, which trades detail for refresh. The 1080p mode has one quarter as many pixels as 4K and can be easier for a PC to render at very high frame rates.

Which games suit 4K 240Hz and 1440p 360Hz?

4K 240Hz suits games where detail and immersion matter and the PC can deliver high performance: racing simulators, action adventures and strategy games are common examples. It is also a versatile desktop resolution for browsing, media and productivity on a 32-inch screen. Competitive games can still run at 4K, but the system may need upscaling or reduced settings to approach 240 fps in graphically demanding scenes.

1440p 360Hz suits fast competitive games such as Counter-Strike 2, Valorant and Overwatch 2 when the player values smooth tracking and low display latency. QHD retains enough detail for general use and reduces pixel count by 55.6% versus 4K. That can make high frame rates more attainable, though the result depends on the CPU and game engine as well as the GPU. A powerful card does not guarantee 360 fps in every match or map.

Mixed libraries weaken the case for choosing solely around one extreme. Alienware AW2725D is a 26.5-inch QHD QD-OLED at 280Hz with a 0.03ms rating; it was £389.97 on Amazon UK on 27 October 2026. MSI MPG 322UR was £848.99. It gives up the 4K sharpness and 360Hz ceiling but combines strong contrast with a somewhat easier pixel load.

What PC do you need for each resolution?

For 4K 240Hz, choose a high-end GPU and check independent benchmark results in the exact games you play. No card can guarantee 240 fps in every 4K game, especially with ray tracing or maximum settings. Upscaling can raise frame rates by rendering internally at a lower resolution and reconstructing the image, but quality varies by mode and game. Check whether a game supports the relevant upscaler and whether you like its output.

1440p 360Hz places more weight on frame rate and often on CPU performance. At 360 fps, a new frame must be delivered about every 2.78ms. Esports titles can reach this on suitable systems, but a processor limit can keep the game below the target even when the GPU has spare capacity. Look at average fps and 1% lows. A stable 250 fps can be a better experience than a 360 fps average with frequent drops.

Connectivity can constrain modes. ASUS lists the PG32UCDP with HDMI 2.1 and DisplayPort 1.4, and the manufacturer supports 4K 240Hz or 1080p 480Hz. Confirm that the PC output, cable and settings permit the chosen refresh rate at the desired colour depth and HDR state. Some high-bandwidth modes use Display Stream Compression. ASUS lists the XG27AQDNG as a QHD 360Hz QD-OLED; check the exact port mode in its manual before connecting a console or laptop.

Which monitor should you buy?

The ASUS ROG Swift PG32UCDP is the pick for a large 4K OLED screen that can switch to a 480Hz Full HD esports mode. Amazon UK listed it at £738.83 on 27 October 2026. For QHD at 360Hz, ASUS ROG Strix OLED XG27AQDNG was £509.00 on Amazon UK on 27 October 2026. Buyers who want a QHD OLED middle ground can consider Alienware AW2725D at 280Hz.

For alternative price tiers, see best 4K gaming monitors, best OLED gaming monitors and how to choose a gaming monitor.