Choosing a gaming monitor

To choose a gaming monitor, start with the graphics card: pick the resolution and refresh rate the GPU can actually drive, then choose the panel type, size, HDR level and ports. For most gaming PCs in 2026 that means a 27-inch 1440p monitor at 180 to 240 Hz. The ASUS ROG Strix OLED XG27AQDMES, a 1440p 240 Hz OLED at £359 on Amazon UK at the time of writing (September 2026), is Compare Electronic's example of the right match for a mid-range GPU.

Spec sheets make every monitor look fast: "1 ms", "HDR" and "G-Sync" appear on £90 and £900 models alike. This guide explains which numbers matter, which are marketing, and how to read them against a specific PC or console.

Which gaming monitor suits my graphics card?

The graphics card decides the monitor, because a monitor only shows the frames the GPU renders. A 240 Hz panel fed 70 frames per second behaves like a 70 Hz panel with VRR. The goal is a resolution at which the GPU reaches, or nearly reaches, the monitor's refresh rate in the games that matter.

Compare Electronic's GPU-to-monitor matching table

The table assumes high settings in recent games, with DLSS or FSR upscaling used at 4K. Esports titles such as Counter-Strike 2 and Valorant run far faster than demanding single-player games, so a competitive player can move one refresh tier higher. A PC still being chosen is covered in Best gaming PC UK 2026.

What resolution and size should a gaming monitor be?

Resolution and size work together through pixel density, measured in pixels per inch (PPI). At a desk distance of 60 to 80 cm, about 100 to 140 PPI looks sharp without demanding a flagship GPU. A 27-inch 1440p monitor sits at 108.8 PPI, which is why 27 inches and 1440p is the default pairing.

Compare Electronic's pixel density table

4K has 2.25 times the pixels of 1440p, so it costs roughly half the frame rate on the same GPU. A 3440 x 1440 ultrawide has 34% more pixels than 16:9 1440p. See Best 4K gaming monitor UK 2026 and Best ultrawide monitor UK 2026 for those formats.

What refresh rate do I need for gaming?

A refresh rate of 144 Hz or higher is the baseline for PC gaming, and 240 Hz is now the sensible default because it costs little extra. Each step cuts the time a frame stays on screen: 16.7 ms at 60 Hz, 6.9 ms at 144 Hz, 4.2 ms at 240 Hz and 2.1 ms at 480 Hz.

• 60 to 144 Hz: the biggest visible jump. Anything below 144 Hz is a work monitor, not a gaming monitor.
• 144 to 240 Hz: clearer motion in fast games. The AOC 24G4ZR reaches 240 Hz native (260 Hz overclocked) for £89.98.
• 360 Hz and above: useful for esports players on fast GPUs. Dual-mode monitors such as the ASUS ROG Swift PG32UCDP switch between 4K 240 Hz and 1080p 480 Hz.

Is IPS, VA or OLED best for gaming?

OLED is the best panel for gaming image quality, IPS is the best value and VA suits dark-room players on a budget. OLED switches pixels in about 0.03 ms and turns them fully off; IPS offers wide viewing angles and no burn-in risk; VA delivers about 3,000:1 contrast against about 1,000:1 for IPS but smears dark transitions.

• OLED suits buyers who game in the evening and want contrast and motion clarity. Static taskbars and HUDs carry a burn-in risk, which makers offset with pixel-refresh routines and, from ASUS, a 3-year warranty that covers burn-in.
• Fast IPS suits all-day desk use, bright rooms and budgets under £200, as in the AOC Q27G42ZE and AOC 24G4ZR.
• VA suits curved budget ultrawides where contrast matters more than motion.

The full breakdown is in IPS vs VA vs OLED, and the OLED shortlist is in Best OLED gaming monitor UK 2026.

Are 1 ms response time claims accurate?

A "1 ms" claim on an LCD monitor is usually a best-case grey-to-grey (GtG) figure measured at the most aggressive overdrive setting, which often adds overshoot artefacts. Independent reviewers measure average GtG transitions across the full range, and a good Fast IPS panel typically lands around 3 to 5 ms in those tests.

• GtG measures how fast a pixel changes colour.
• MPRT measures how long a moving image persists, and drops with backlight strobing, which lowers brightness.
• OLED at about 0.03 ms GtG makes the refresh rate, not the pixel, the limit on motion clarity.

The practical rule: at 240 Hz an LCD needs transitions under 4.2 ms to finish within one frame. Trust measured averages over the box figure.

Which HDR label matters on a gaming monitor?

DisplayHDR 600, DisplayHDR 1000 and DisplayHDR True Black 400 are the labels that deliver visible HDR; plain "HDR10" and DisplayHDR 400 do not. HDR10 only means the monitor accepts an HDR signal. VESA's DisplayHDR tiers set measured minimums:

• DisplayHDR 400: 400 nits peak, no local dimming required. Little real HDR on an IPS panel.
• DisplayHDR 600 and 1000: 600 or 1,000 nits with local dimming, typically Mini LED. Real HDR highlights.
• DisplayHDR True Black 400 and 500: OLED tiers with near-zero black. The ASUS ROG Swift PG32UCDP is certified DisplayHDR True Black 400, and contrast makes it look stronger than its nit figure suggests.

Do I need DisplayPort 2.1, HDMI 2.1 and G-Sync?

DisplayPort 1.4 is enough for almost every gaming monitor in 2026, HDMI 2.1 is needed for consoles at 4K 120 Hz, and any FreeSync or G-Sync Compatible monitor works with both Nvidia and AMD cards. DisplayPort 1.4 carries 25.9 Gbps of usable data and uses Display Stream Compression (DSC) above that; HDMI 2.1 carries up to 48 Gbps and DisplayPort 2.1 UHBR20 up to 80 Gbps. 10-bit HDR adds 25% to each figure in the table.

Compare Electronic's connection guide

• DSC is visually lossless in practice; the main catch is slower Alt-Tab on some Nvidia setups.
• Consoles: PS5 and Xbox Series X output 4K 120 Hz and 1440p 120 Hz. The AOC Q27G42ZE has one HDMI 2.0 port, which handles 1440p 120 Hz; 4K 120 Hz needs HDMI 2.1, as on the ASUS ROG Swift PG32UCDP. See Best TV for PS5 and Xbox Series X for the TV route.
• Adaptive sync: VRR matches the refresh rate to the frame rate to stop tearing. FreeSync, G-Sync Compatible and VESA AdaptiveSync all do this; Low Framerate Compensation keeps it working when frames drop below about 48 per second.

Which gaming monitors fit each budget?

Four monitors on Amazon UK show how the rules translate into buys at September 2026 prices, from £89.98 to £739.

ASUS ROG Strix OLED XG27AQDMES - the mid-range match

The ASUS ROG Strix OLED XG27AQDMES is a 26.5-inch 2560 x 1440 OLED at 240 Hz with 0.03 ms GtG, 99% DCI-P3 coverage and two HDMI 2.1 ports. ASUS backs it with a 3-year warranty. At £359 on Amazon UK (September 2026) it pairs with an RTX 5070 or RX 9070.

AOC Q27G42ZE - the cheap 1440p match

The AOC Q27G42ZE is a 27-inch 1440p Fast IPS panel rated at 240 Hz native and 260 Hz overclocked, with G-Sync Compatible support and one HDMI 2.0 and one DisplayPort 1.4 input. At £158.98 on Amazon UK (September 2026) it suits an RTX 5060 Ti or RX 9060 XT. More picks are in Best budget gaming monitor UK 2026.

ASUS ROG Swift PG32UCDP - the 4K match

The ASUS ROG Swift PG32UCDP is a 32-inch 4K WOLED at 240 Hz with a 1080p 480 Hz mode, DisplayHDR True Black 400, two HDMI 2.1 ports and 90 W USB-C. At £739 on Amazon UK (September 2026) it suits an RTX 5080 or RTX 5090 and doubles as a PS5 screen at 4K 120 Hz.

AOC 24G4ZR - the entry-level match

The AOC 24G4ZR is a 23.8-inch 1080p Fast IPS at 240 Hz native and 260 Hz overclocked, with 130 mm height adjustment and pivot. At £89.98 on Amazon UK (September 2026) it is the match for an RTX 5050 or Arc B580 and for esports players.

Verdict: how to choose a gaming monitor

Choose a gaming monitor in this order: GPU, resolution, refresh rate, panel, then HDR and ports. For most PCs that ends at a 27-inch 1440p panel at 240 Hz, such as the ASUS ROG Strix OLED XG27AQDMES at £359 or the AOC Q27G42ZE at £158.98. Entry GPUs suit the AOC 24G4ZR at £89.98, and only an RTX 5080 or RTX 5090 earns the ASUS ROG Swift PG32UCDP at £739.