Best PC Cases Under £100 UK 2026 | 6 Tested & Ranked

1. MSI MAG PANO 110R PZ White

The MSI MAG PANO 110R PZ White punches well above its £79.99 price tag, and it’s my top pick among the best pc cases under £100 for good reason. That panoramic tempered glass panel wraps around three sides, giving you an unobstructed view of your components without the chunky bezels you’d normally see at this price point. It’s a compact case that doesn’t feel cramped, and the white finish looks properly premium.

What surprised me during testing was the thermal performance. Despite the glass-heavy design, airflow is better than expected thanks to the ventilated top and bottom panels. I ran a Ryzen 7 7800X3D with an RTX 4070 Ti inside for a week, and temps stayed well within acceptable ranges even during extended gaming sessions. The case supports GPUs up to 365mm and CPU coolers up to 165mm, which covers most modern hardware.

Cable management is straightforward with decent routing channels behind the motherboard tray. You get three included fans (two front, one rear), which is more than some cases at double the price. The build quality feels solid for the money, though the front panel connectors are a bit flimsy. For builders wanting a showpiece case without spending over £100, this is the one. We covered this in detail in our full MAG PANO 110R PZ White review.

Editor's pick: MSI MAG PANO 110R PZ WHITE - Mid-tower Gaming PC Case - Supports up to 400 mm GPU in length, Removable Dust Filters, USB 20Gbps (Type-C), Back-connect ATX & Micro-ATX Motherboard support.

2. NZXT H6 Flow

The NZXT H6 Flow at £73.97 represents what modern budget cases should be. That dual-chamber design separates your components from the PSU and cables, making builds look clean without spending hours on cable management. It’s one of the best pc cases under £100 if you care about thermals, with a full mesh front panel that doesn’t restrict airflow like older NZXT cases used to.

I built three different systems in this case during testing, and every time the process was smooth. The interior layout makes sense, with proper standoffs for vertical GPU mounting (bracket sold separately) and enough clearance for 365mm graphics cards. CPU cooler height maxes out at 163mm, which handles most air coolers but rules out the chunkier Noctua models. Top radiator support goes up to 360mm, perfect for AIO cooling.

Where this case shines is the attention to detail. Cable routing channels are well-placed, the tempered glass panel has a proper hinge mechanism instead of thumbscrews, and the drive mounting system is tool-free. You get two 2.5-inch bays and one 3.5-inch bay, which is adequate for most builds. At under £75, it’s proper value. Check our NZXT H6 Flow review for detailed thermal testing results.

3. NZXT H6 Flow RGB White

At £99.99, the NZXT H6 Flow RGB White sits right at the budget ceiling, but it justifies the price with pre-installed RGB fans and premium materials. This is essentially the standard H6 Flow with added lighting and a cleaner white finish that photographs beautifully. For builders wanting one of the best pc cases under £100 with RGB out of the box, this eliminates the need to buy separate fans.

The RGB implementation is actually good, not the garish nonsense you sometimes see on budget cases. Three RGB fans come pre-installed and connected to an included controller, so you can cycle through lighting modes without software. The mesh front panel maintains the excellent airflow of the standard H6 Flow, and the dual-chamber design keeps cables hidden from view.

Hardware support is identical to the non-RGB version: 365mm GPU length, 165mm cooler height, and 360mm radiator support up top. Build quality feels a step above typical budget cases, with thicker steel panels and a tempered glass side that doesn’t flex when you handle it. The white coating is consistent across all panels, which isn’t always the case (pun intended) with painted budget enclosures. See our NZXT H6 Flow RGB review for lighting performance analysis.

4. NZXT H6 Flow RGB Black

The black variant of the H6 Flow RGB costs £96.99, making it slightly cheaper than the white version while offering identical features. If you prefer a stealthy aesthetic over the clean white look, this is your case. It’s one of the best pc cases under £100 for RGB enthusiasts who don’t want the unicorn vomit look but still appreciate quality lighting.

Everything I said about the white version applies here: three pre-installed RGB fans, dual-chamber design, mesh front panel, and solid build quality. The black finish hides fingerprints better than the white, which matters if you’re constantly tinkering with your build. The RGB fans look particularly good against the dark interior, creating nice contrast without overwhelming the components.

Thermal performance is identical across all H6 Flow variants. I tested this with the same hardware as the white version (Ryzen 7 7800X3D, RTX 4070 Ti), and temps were within 1-2°C. The mesh front allows unrestricted airflow, and the dual-chamber design keeps hot PSU exhaust away from your main components. For £97, you’re getting a case that competes with £130+ options. Our detailed H6 Flow RGB review covers both colour variants.

5. NZXT H5 Flow RGB

The NZXT H5 Flow RGB at £67.44 is the cheapest case in this roundup, but it offers the most generous hardware clearances. With support for GPUs up to 410mm and CPU coolers up to 170mm, it accommodates bigger components than cases costing £30 more. This makes it one of the best pc cases under £100 for first-time builders who want flexibility without overspending.

The H5 Flow uses a more traditional single-chamber design rather than the dual-chamber layout of the H6, which means cable management requires more effort. But NZXT includes plenty of routing channels and velcro straps, so with a bit of patience you’ll still get clean results. The mesh front panel provides excellent airflow, and you can mount 360mm radiators in both the front and top positions.

Build quality is good for the price, though the steel feels slightly thinner than the H6 series. The tempered glass panel uses thumbscrews instead of a hinge mechanism, which is fine but less convenient. You get three drive bays (two 2.5-inch, one 3.5-inch), matching the H6’s storage capacity. For £67, this case delivers ridiculous value, especially if you’re planning to use a large GPU or tower cooler. See our NZXT H5 Flow RGB review for build process details.

6. Corsair 3500X

The Corsair 3500X at £84.99 takes a different approach to the NZXT cases, prioritising versatility over flashy features. This is one of the best pc cases under £100 for builders planning custom water cooling loops, with support for 360mm radiators in three positions: top, side, and rear. That’s exceptional radiator support for this price bracket.

The interior layout is straightforward and beginner-friendly. Corsair uses a traditional design with clear component placement and sensible cable routing. You can fit GPUs up to 410mm and CPU coolers up to 170mm, matching the H5 Flow’s generous clearances. The mesh front panel provides solid airflow, though it’s not quite as open as NZXT’s implementation.

Build quality is typical Corsair: solid steel construction, good paint finish, and a tempered glass panel that feels substantial. You get four drive bays (two 2.5-inch, two 3.5-inch), which is more storage capacity than any other case here. The minimalist design won’t win beauty contests, but it ages well and doesn’t look dated after a year. For straightforward builds with potential water cooling upgrades, this is the sensible choice. Read our Corsair 3500X review for water cooling configuration examples.