Best RGB Computer Cases Under £100

1. 1ST PLAYER Trilobite T3 Micro-ATX PC Case Review UK 2026

Price: £39.93 | Rating: ★★★★★ (5.0)

Here's the thing: when you're hunting for the best RGB computer cases under £100, you don't always need to spend anywhere near the ceiling. The 1ST PLAYER Trilobite T3 proves that point convincingly. At under £40, it delivers ARGB lighting that actually looks good through the tempered glass side panel, a build quality that feels more expensive than it is, and a compact Micro-ATX footprint that suits smaller desk setups perfectly.

The ARGB fans included in the box are a genuine bonus. A lot of cases at this price ship with plain fans or no fans at all, so getting lit fans ready to go out of the box is proper decent value. Cable management is tighter than you'd get in a full-size mid-tower, which is the main trade-off with the mATX form factor. But if your build is compact by design, that's not really a problem.

Airflow is reasonable rather than exceptional. The front panel isn't a full mesh design, so if you're pushing a high-end GPU hard, you'll want to keep an eye on temperatures. For mid-range builds with a decent CPU cooler, it's absolutely fine. The build process is straightforward, with tool-free panel removal making things easier for first-timers.

For anyone building a budget gaming rig and wanting that RGB glow without spending serious money, this is the one to beat in the best RGB computer cases under £100 category. It's our top pick for a reason.

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2. PC Case - Gaming | IONZ APEX Vision - ATX Mid Tower, Dual Chamber with 4 ARGB PWM Fans - LCD Screen | Black

Rating: ★★★★☆ (4.0)

The IONZ APEX Vision is a bit of a wildcard. That LCD screen on the front panel is either going to excite you or make you roll your eyes. But look past the gimmick and there's actually a solid beginner-friendly case here. Four ARGB PWM fans are included, the dual-chamber design keeps your PSU and cables hidden away from the main build area, and the ATX support means you've got room to grow.

For beginners especially, the dual-chamber layout is a genuine help. Routing cables through a dedicated compartment makes the build process less intimidating and the finished result looks much cleaner. You're not fighting cables in front of your motherboard the whole time. That alone makes it worth considering if this is your first build.

The LCD screen can display system stats, custom images, or animations, depending on what software you connect it to. It's a talking point, no question. Whether it's useful long-term is another matter. But at under £50, it's hard to argue with the feature set. Four ARGB fans, dual-chamber, LCD screen, and ATX support. That's a lot of case for the money.

Build quality is decent without being exceptional. The steel feels a touch thin in places, and the plastic trim around the LCD panel isn't the most premium finish. But for a first build or a budget gaming rig, the IONZ APEX Vision delivers more than its price suggests.

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3. GAMDIAS AURA GC1 ELITE ARGB ATX Mid Tower PC Case, 4 x 120 ARGB Fan, High Airflow Mesh Front Panel, Tool-Free Install Tempered Glass Side Panel, Black

Rating: ★★★★½ (4.8)

GAMDIAS isn't a brand that gets talked about as much as it should. The AURA GC1 ELITE is a proper mid-tower with a mesh front panel, four 120mm ARGB fans pre-installed, and tool-free tempered glass removal. At just over £90, it sits near the top of the budget range, but the spec sheet justifies it.

That mesh front panel is the headline feature for anyone who cares about thermals. Solid glass fronts look stunning but they choke airflow. Mesh doesn't. With four ARGB fans pulling air through a proper mesh intake, this case will keep temperatures noticeably lower than glass-fronted alternatives at a similar price. If you're fitting a mid-range GPU and a decent CPU, that matters.

Tool-free installation is a nice touch. The tempered glass side panel clips in and out without needing a screwdriver, which makes cable tidying and component swaps much less of a faff. The interior layout is well thought out with good cable routing channels and a PSU shroud that keeps the bottom of the case looking tidy.

The ARGB lighting from the four included fans is vibrant and syncs with most major motherboard RGB software. It's not the most sophisticated lighting system, but it looks great and it works. For a case focused on airflow and RGB together, the GAMDIAS AURA GC1 ELITE is one of the stronger options in the best RGB computer cases under £100 bracket.

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4. NZXT H9 Elite CM-H91EW-01 Dual-Chamber ATX Mid-Tower PC Gaming Case Includes 3 x 120mm F120 RGB Duo Fans with Controller Glass Front, Top & Side Panels 360mm Radiator Support White

Price: £89.95 | Rating: ★★★★½ (4.8)

The NZXT H9 Elite sits right at the £100 ceiling, and it earns every penny. This is the case you buy when you want a build that looks genuinely premium without crossing into the £150 to £200 territory. Glass on the front, top, and side panels means your components are on show from almost every angle. Combined with three F120 RGB Duo fans and a dedicated RGB controller, the lighting effect is genuinely impressive.

The dual-chamber design is NZXT's signature layout. Your PSU and cables live in a separate compartment behind the motherboard tray, keeping the main chamber clean and uncluttered. It makes cable management much more manageable and the finished build looks like something out of a showcase. For a case under £100, that's a remarkable result.

360mm radiator support at the top means liquid cooling is a real option, not just a theoretical one. The case is wide enough to accommodate most 360mm AIOs without clearance issues. That's forward-thinking design at a budget price.

The main limitation is airflow. All that glass looks stunning but it restricts intake air compared to mesh alternatives. If you're running a high-end GPU in a warm room, you'll want to monitor temperatures carefully. But for mid-range builds where aesthetics matter as much as performance, the NZXT H9 Elite is the best-built case in this entire roundup.

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5. Lian Li O11 Dynamic Mini V2 PC Case White | Compact ATX Mid Tower with Dual-Chamber Design, Tempered Glass and Modular Layout

Price: £88.38 | Rating: ★★★★½ (4.7)

The O11 Dynamic is one of the most popular case designs in PC building, and the Mini V2 brings that dual-chamber layout into a more compact package. It's a smart choice if you want ATX support without the bulk of a full-size mid-tower. The modular layout means you can configure fan and radiator positions to suit your cooling setup, which is genuinely useful for custom loop builders.

Tempered glass on the side gives you a clear view of the interior, and the white finish looks clean and modern. For RGB builds, the O11 Mini V2 is a great showcase case. The dual-chamber keeps cables out of sight, so your ARGB fans and GPU lighting take centre stage without a mess of cables ruining the effect.

The modular design does add some complexity to the build process. It's not the most beginner-friendly case in this roundup. But for builders with a bit of experience who want flexibility in their cooling layout, it's worth the extra effort. Radiator support is generous for a compact case, and the overall build quality is exactly what you'd expect from Lian Li.

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6. Lian Li A3 Micro ATX Wood Edition Cabinet Black A3-MATX-WD

Price: £70.02 | Rating: ★★★★½ (4.7)

This one is genuinely different. The Lian Li A3 Wood Edition uses real wood panelling on the exterior, giving it a look that stands out completely from the sea of tempered glass and mesh cases. It's a Micro-ATX case, so it's compact by nature, and the wood finish gives it a warmth that most PC cases simply don't have.

For RGB builds, the wood exterior creates an interesting contrast with interior lighting. ARGB fans glowing through the tempered glass side panel against a wood exterior is a distinctive look. It won't be for everyone, but if you want a build that people actually stop and look at for the right reasons, this delivers.

Build quality is solid throughout. It's Lian Li, so the steel frame is well made and the fit and finish is good. The wood panels are properly finished, not cheap veneer. Cable management is decent for an mATX case, though tighter than a full mid-tower as you'd expect.

The main limitation is the Micro-ATX form factor. If you're planning a full ATX build, this isn't the case for you. And at £70, you're paying a premium for the aesthetic. But as a niche pick for someone who wants something genuinely different, the A3 Wood Edition earns its place in any best RGB computer cases under £100 list.

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7. CORSAIR FRAME 4000D RS ARGB Modular Mid-Tower ATX PC Case, High Airflow, 3x Pre-Installed RS ARGB Fans, InfiniRail™ Fan Mounting System, ASUS BTF, MSI Project Zero, Gigabyte Project Stealth, Black

Price: £92.99 | Rating: ★★★★½ (4.7)

Corsair's FRAME 4000D RS is one of the more forward-thinking cases in this roundup. The InfiniRail fan mounting system lets you slide fans along a rail rather than screwing them into fixed positions, which sounds like a small thing until you've spent twenty minutes trying to align a fan with a radiator. It's genuinely clever and makes building and reconfiguring much easier.

Three RS ARGB fans come pre-installed, and the compatibility with ASUS BTF, MSI Project Zero, and Gigabyte Project Stealth means this case is ready for the next generation of cable-free motherboard connectors. That's future-proofing you don't usually get at this price point.

Airflow is strong. The front panel design allows good intake, and with three ARGB fans moving air from the front, thermals are well managed for mid to high-end builds. The ARGB lighting from the RS fans is vibrant and syncs through Corsair iCUE, which is one of the better RGB software platforms available.

At this price, it's not the cheapest option, but the combination of Corsair build quality, the InfiniRail system, and BTF compatibility makes it genuinely worth the price. Among the best RGB computer cases under £100, this is the one that feels most ready for where PC building is heading.

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8. Montech AIR 903 MAX PC Case Review UK 2026

Rating: ★★★★½ (4.6)

The Montech AIR 903 MAX is the best budget pick in this roundup, and it's not particularly close. At £60, you get a full mesh front panel, a strong fan bundle, and airflow performance that embarrasses cases costing significantly more. Montech has built a reputation for delivering genuine value, and the AIR 903 MAX is the clearest example of that.

The mesh front panel is the star of the show. Air flows freely through the front, and with multiple ARGB fans moving that air through the case, temperatures stay impressively low even under load. For anyone building a gaming PC where thermals matter, this is the most thermally capable case in the best RGB computer cases under £100 category.

The ARGB lighting is vibrant and the fans are well made for the price. They're not going to replace premium Lian Li or Corsair fans, but they're a solid step above the cheapest budget options. The overall build quality is decent, with a steel chassis that feels solid and panels that fit together properly without obvious gaps or flex.

Cable management is good with plenty of routing space behind the motherboard tray. The PSU shroud keeps the bottom of the case tidy. And the overall interior layout is logical and easy to work with. So if you want the best airflow for your money in an RGB case under £100, the Montech AIR 903 MAX is the answer.

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9. Geekworm Raspberry Pi 4 Aluminum Case - Heavy Duty Passive Heat Dissipation Metal Case for Raspberry Pi 4B Only

Price: £14.99 | Rating: ★★★★½ (4.7)

Look, this one needs to be addressed directly. The Geekworm Raspberry Pi 4 Aluminum Case is not a PC case in any meaningful sense for this roundup. It's a small aluminium enclosure for a Raspberry Pi 4B, designed for passive cooling. There's no RGB lighting, no fan support, no ATX compatibility, and no relevance to the best RGB computer cases under £100 category whatsoever.

It's a well-made product for what it is. The aluminium construction acts as a heatsink, keeping the Pi cool without any fans. At this price, it's good value for Pi enthusiasts. But if you're here looking for a gaming PC case, this isn't it. Skip it entirely and look at the other options in this roundup.

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10. Lian Li UNI FAN SL-INF Reverse Blade - Infinity Mirror ARGB PC Fan - Black

Price: £24.98 | Rating: ★★★★½ (4.6)

Another product that needs a bit of context. The Lian Li UNI FAN SL-INF is a fan, not a case. It's an excellent fan with a genuinely impressive infinity mirror ARGB effect, and if you're upgrading the fans inside one of the cases in this roundup, it's worth knowing about. But it's not a case itself.

At this price per fan, it's a premium add-on that makes sense if you're buying a case like the Lian Li V100 or O11 Mini V2 that doesn't include fans. The infinity mirror effect is one of the most visually striking ARGB fan designs available. The reverse blade design also improves airflow characteristics compared to standard fan layouts.

If you're building a showcase RGB system and you want the fans to be as impressive as the case, these are worth the investment. But they're a supplement to the cases in this roundup, not a replacement for one.

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11. Lian Li A3-mATX Tempered Glass Panel, Black, Tempered Glass, Steel + Aluminum Frame

Price: £92.99 | Rating: ★★★★½ (4.5)

The Lian Li A3-mATX Tempered Glass Panel is exactly what it says. A replacement tempered glass side panel for the Lian Li A3-mATX case. If you already own that case and you've cracked or scratched the original panel, this is the part you need. It's well made, as you'd expect from Lian Li, with a steel and aluminium frame holding the tempered glass securely.

But it's not a case. It has no relevance to anyone shopping for the best RGB computer cases under £100 unless they already own the specific Lian Li A3-mATX and need a replacement panel. At this price for a single panel, it's also expensive in isolation. Worth knowing about if you're in that specific situation. Otherwise, look elsewhere in this roundup.

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