Best 240Hz Monitors Under £400

The pursuit of ultra-smooth gameplay has driven monitor technology forward considerably in recent years. Yet there's a persistent misconception: you need a 240Hz display to be competitive. The reality is more nuanced. Most budget gamers thrive at 120Hz to 180Hz, where the jump in visual fluidity becomes genuinely noticeable compared to 60Hz. A 240Hz monitor under £400 remains a rare commodity in 2025, largely because true 240Hz panels at affordable prices are limited, particularly in larger screen sizes. This guide examines what's actually available at the budget end, how 180Hz monitors compare, and whether the leap to 240Hz is worth the investment for your setup and gaming habits.

Quick Verdict

Best Overall: Alienware 27 Gaming Monitor AW2725DM offers the closest experience to true 240Hz performance at the budget boundary with QHD resolution and 180Hz refresh rate, ideal for competitive and fast-paced gaming.

Best Value: AOC 24G15N2 delivers 180Hz gaming performance at a mid-range price point, offering solid refresh rate speed without stretching the budget.

1. AOC 24B3QA2 24 Inch Full HD Monitor

The AOC 24B3QA2 enters this comparison as a transitional product, occupying the boundary between budget gaming monitors and professional-grade displays. At 100Hz maximum refresh rate, this falls below gaming-focused competitors, yet the price point suggests positioning aimed at enthusiasts seeking colour accuracy alongside some refresh rate capability. The 1ms IPS panel delivers excellent response time paired with the colour fidelity and viewing angles IPS technology provides, appealing to photographers, video editors, or creative professionals who also game occasionally. The 24-inch 1920x1080 resolution maintains standard proportions without compromising panel cost. This monitor prioritises visual accuracy over refresh rate speed, representing a different value proposition than pure gaming-focused alternatives. For esports competitors, the 100Hz refresh rate feels inadequate compared to 144Hz or 180Hz monitors, though still superior to 60Hz systems. Creative professionals benefit from the colour accuracy and viewing angle consistency that IPS panels provide, making this suitable for dual-purpose setups combining work and gaming. The 3.8kg weight remains practical for repositioning. The monitor's positioning at this price point with 100Hz maximum refresh rate appears anomalous; equivalent gaming monitors often cost considerably less. This suggests either premium build quality or features beyond refresh rate specifications. Gaming performance remains adequate for casual play, though competitive gamers should prioritise higher refresh rate alternatives. This monitor suits users whose primary concern is colour accuracy with gaming as a secondary consideration.

How We Picked

This guide examines monitors currently available under £400 with refresh rates approaching 240Hz, focusing on realistic performance at accessible prices. Our methodology prioritised refresh rate capability as the primary sorting criterion, since the article specifically addresses 240Hz monitors. However, we recognised that true 240Hz panels under £400 are essentially unavailable in 2025, so we shifted focus to 180Hz alternatives representing the practical maximum for budget gamers. We evaluated refresh rate alongside resolution, panel technology, response time, and screen size, ensuring each recommendation addressed different use cases within the budget constraint. Specifications came from manufacturer data and current UK retailer listings, with prices verified against multiple sources for accuracy. We considered GPU compatibility requirements, recognising that high refresh rates demand reasonably powerful graphics cards. Panel technology comparison (IPS versus VA) informed viewing experience predictions. We balanced specification analysis with practical application, ensuring recommendations suited real gaming scenarios rather than pure numerical superiority.

Buying Guide

Understanding monitor specifications requires clarity on what actually impacts your gaming experience. Refresh rate, measured in Hertz, describes how many times per second the display updates its image. The difference between 60Hz and 120Hz feels immediately noticeable: motion appears substantially smoother, and panning camera movements show dramatically reduced blur. The jump from 120Hz to 180Hz proves less dramatic than 60Hz to 120Hz, yet still meaningful, particularly in fast-paced competitive titles. The 240Hz proposition requires careful consideration: achieving 240fps consistently demands high-end graphics cards, and the visual difference from 180Hz becomes subtle for most players. For competitive esports, 240Hz justifies investment; for casual gaming, 120Hz or 180Hz suffices.

Resolution versus refresh rate requires balancing. Higher resolutions (1440p versus 1080p) provide sharper image clarity but demand more GPU power, potentially limiting refresh rate achievement. At 24-inch screen size, 1080p remains visually acceptable; at 27 inches and beyond, 1440p becomes increasingly worthwhile for visual clarity. Response time, measured in milliseconds, describes pixel transition speed. 1ms response times suit competitive gaming; 4ms still performs acceptably for most titles. Panel technology matters: IPS panels provide superior colour accuracy and viewing angles but cost slightly more; VA panels offer contrast advantages at lower cost; TN panels have become rare but historically offered fastest response times.

GPU compatibility demands honest assessment. Achieving 180Hz in modern demanding titles requires at least an RTX 3060 Ti or RTX 4070 equivalent. Entry-level systems with RTX 4050 or RTX 3060 may struggle maintaining 180Hz in latest AAA releases at 1080p maximum settings. Esports titles like Counter-Strike 2 or Valorant prove far less demanding, allowing older GPUs to hit 180Hz. Budget for your full setup: a premium monitor on a compromised GPU system wastes capability. Most gamers benefit more from upgrading their graphics card than their monitor when considering refresh rate improvements. Consider future GPU upgrade plans when selecting a monitor, since the display should outlast graphics cards through multiple upgrade cycles.

Final Verdict

The Alienware AW2725DM emerges as the overall winner for gamers prioritising both refresh rate capability and visual quality. The combination of QHD resolution, 180Hz refresh rate, 1ms response time, and Fast IPS panel technology creates the most complete package under our £400 budget constraint. Whilst the price sits higher than some alternatives, the visual quality advantage from QHD resolution combined with the performance benefits of 180Hz and 1ms response time justifies the investment for serious gamers. The Fast IPS panel technology particularly distinguishes this monitor: colour accuracy and viewing angles at this price point rival displays costing considerably more.

However, different gamers benefit from different recommendations. The AOC 24G15N2 delivers outstanding value for competitive esports players: the 180Hz refresh rate matches the Alienware whilst costing £45 less, freeing budget for peripheral upgrades. The Acer Nitro KG241YS3 suits budget-conscious first-time high-refresh buyers seeking the jump from 60Hz to 180Hz without excessive expenditure. The Acer Nitro KG242YGbmipfx provides entry-level access to gaming monitor technology for students or casual players.

Addressing the fundamental question this guide tackles: true 240Hz monitors under £400 simply don't exist in the current UK market. The closest practical alternative involves 180Hz displays, which deliver 75 per cent of the visual benefit at accessible pricing. For most gamers, 180Hz provides enough motion smoothness that competing priorities like resolution, colour accuracy, or panel quality become more impactful than incremental refresh rate increases. The jump from 60Hz to 180Hz feels revolutionary; the jump from 180Hz to 240Hz feels evolutionary. Budget allocation should reflect this reality, with remaining funds invested in GPU upgrades enabling you to actually achieve and sustain these refresh rates in real gaming scenarios.