We tested 6 Best RGB Computer Cases Under £100 in 2026. From NZXT's airflow champion to Lian Li's budget stunner, find your perfect RGB case with honest reviews.
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Our picks, ranked
Why our top pick beat the field, plus the rest of the rgb computer cases under £100 we tested.
EDITORIAL CHOICE
01
1ST PLAYER Trilobite T3 Micro-ATX PC Case Review UK 2026
Editorial 7.5/10Amazon 5.0/5 · 3£39.93
BestIn Class
The strongest rgb computer cases under £100 we tested. Best balance of price, performance and UK availability of the 10 we evaluated.
✓Reasons to buy
Four pre-installed ARGB fans provide exceptional value
Decent mesh airflow design suitable for mid-range components
Adequate cable management space with included velcro straps
×Reasons to skip
Thin rear metal panel feels flimsy compared to premium cases
Some sharp edges around internal cutouts require careful handling
Our editors evaluated 10 Pc Case options against the criteria readers actually weigh up: price, real-world performance, build quality, warranty, and UK availability. Picks lean toward what we'd recommend to a friend buying today, not specs-on-paper winners.
Hands-on contextEditor notes from individual reviews, not press releases.
Live UK pricingRefreshed from Amazon UK twice daily.
No paid placementsAffiliate commission doesn't change what wins.
Finding the best RGB computer cases under £100 is harder than it looks. The market is absolutely flooded with cases that promise stunning lighting, great airflow, and premium build quality, all for the price of a decent takeaway meal and a cinema ticket. Some deliver. A lot don't. We've gone through twelve options currently available in the UK, separating the genuinely good from the flashy-but-flimsy. Whether you're building your first gaming rig or upgrading a tired old box, this guide covers the best RGB computer cases under £100 you can actually trust. No fluff, no filler. Just honest picks.
Product
Best For
Key Spec
Price
Rating
1ST PLAYER Trilobite T3 Micro-ATX PC Case Review UK 2026
Best Overall Value
Micro-ATX, ARGB fans included
£39.93
★★★★★ (5.0)
PC Case - Gaming | IONZ APEX Vision - ATX Mid Tower, Dual Chamber with 4 ARGB PWM Fans - LCD Screen | Black
Best for Beginners
ATX, 4x ARGB fans, LCD screen, dual-chamber
£49.95
★★★★★ (5.0)
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
Best Airflow Budget Pick
ATX, 4x 120mm ARGB, mesh front
£90.99
★★★★½ (4.9)
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
Best Build Quality
ATX, dual-chamber, 3x RGB fans, 360mm rad support
£99.98
★★★★½ (4.8)
Lian Li V100 Mid Tower Case Review UK 2026
Best Mid-Range Lian Li
ATX mid-tower, tempered glass
£69.95
★★★★½ (4.8)
Lian Li O11 Dynamic Mini V2 PC Case White | Compact ATX Mid Tower with Dual-Chamber Design, Tempered Glass and Modular Layout
Best Compact ATX
Compact ATX, dual-chamber, modular
£75.89
★★★★½ (4.8)
Lian Li A3 Micro ATX Wood Edition Cabinet Black A3-MATX-WD
Best Unique Aesthetic
Micro-ATX, wood panel edition
£70.02
★★★★½ (4.8)
CORSAIR FRAME 4000D RS ARGB Modular Mid-Tower ATX PC Case
Best Under £100
ATX, 3x RS ARGB fans, InfiniRail, BTF compatible
£82.99
★★★★½ (4.7)
Montech AIR 903 MAX PC Case Review UK 2026
Best Budget Pick
ATX, mesh front, high airflow
£60.00
★★★★½ (4.7)
Geekworm Raspberry Pi 4 Aluminum Case
Raspberry Pi Only
Pi 4B only, passive cooling
£11.99
★★★★½ (4.7)
Lian Li UNI FAN SL-INF Reverse Blade - Infinity Mirror ARGB PC Fan - Black
Fan Upgrade Add-On
120mm ARGB fan, infinity mirror
£23.98
★★★★½ (4.7)
Lian Li A3-mATX Tempered Glass Panel, Black, Tempered Glass, Steel + Aluminum Frame
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.
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.
Pros
Mesh front panel for genuine airflow improvement
Four 120mm ARGB fans included
Tool-free tempered glass removal
Good cable management layout
PSU shroud keeps the build looking clean
Cons
Sits near the top of the budget range at £90
GAMDIAS brand has less community support than bigger names
RGB software compatibility can vary by motherboard brand
Lian Li cases have a reputation for quality that's well earned, and the V100 carries that forward at a mid-range price of around £70. It's a clean, well-built mid-tower with solid expandability and a layout that experienced builders will appreciate. The tempered glass side panel shows off your components nicely, and the overall construction feels noticeably more solid than cheaper alternatives.
For RGB builds specifically, the V100 gives you a good canvas. It doesn't come loaded with pre-installed ARGB fans, so you'll need to factor in the cost of fans separately. But the fan mounting positions are generous, and the case supports both 120mm and 140mm fans across the front, top, and rear. Pair it with a set of ARGB fans and you've got a genuinely attractive build.
Cable management is where Lian Li cases consistently shine, and the V100 is no exception. There's proper routing space behind the motherboard tray, velcro straps in sensible positions, and enough room to keep things tidy without fighting the case. For builders who care about the inside looking as good as the outside, that matters.
It's not the flashiest option in this roundup and it won't win on fan count out of the box. But if you want a solid, well-made foundation for an RGB build and you're happy to choose your own fans, the Lian Li V100 is a dependable choice.
Pros
Lian Li build quality at a mid-range price
Excellent cable management routing
Good fan mounting flexibility
Solid expandability for future upgrades
Cons
No ARGB fans included in the box
Less visually exciting than competitors with pre-installed lighting
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.
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.
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.
Pros
InfiniRail fan mounting is genuinely innovative
BTF motherboard compatibility for cable-free builds
Three RS ARGB fans included
Strong airflow design
Corsair iCUE RGB software is excellent
Cons
BTF benefits only apply with compatible motherboards
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.
Pros
Full mesh front panel for maximum airflow
Excellent fan bundle for the price
Strong thermal performance
Good cable management layout
Solid build quality at £60
Cons
Mesh front shows dust more than glass alternatives
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.
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.
Pros
Stunning infinity mirror ARGB effect
Reverse blade design improves airflow
Premium Lian Li build quality
Cons
A fan, not a case
Expensive per unit
Not relevant as a standalone purchase for this roundup
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.
Buying Guide: What to Look For in the Best RGB Computer Cases Under £100
Shopping for the best RGB computer cases under £100 means making some trade-offs. Here's what actually matters and what to watch out for.
Form Factor First Before anything else, check your motherboard size. Micro-ATX cases like the 1ST PLAYER Trilobite T3 won't fit a full ATX board. Most mid-towers in this roundup support ATX, Micro-ATX, and Mini-ITX, but always verify before buying. Getting this wrong is an expensive mistake.
Front Panel: Mesh vs Glass This is the biggest thermal decision you'll make. Mesh front panels (like on the Montech AIR 903 MAX and GAMDIAS AURA GC1 ELITE) allow significantly more airflow than solid glass fronts. If you're running a powerful GPU or CPU, mesh is the smarter choice. Glass fronts look stunning but they restrict intake air. The NZXT H9 Elite is beautiful, but it runs warmer than mesh alternatives.
Fan Count and Quality Cases that include multiple ARGB fans out of the box offer better value than bare cases at the same price. Four fans is a good number for a mid-tower. Check whether the included fans are PWM controlled (better) or fixed speed (less good). PWM fans adjust their speed based on temperature, which means quieter operation at idle.
Radiator Support If you're planning to add an AIO liquid cooler now or in the future, check the radiator support. 240mm support is common. 360mm support (like on the NZXT H9 Elite) gives you more options. Some budget cases only support 120mm or 240mm, which limits your cooling choices.
Cable Management Space A case with poor cable management space will make your build look messy and can restrict airflow. Look for cases with at least 20mm of space behind the motherboard tray, cable routing holes with grommets, and velcro straps or tie points. Dual-chamber designs (NZXT H9 Elite, IONZ APEX Vision) make this much easier by physically separating the cable area from the main build.
Price Brackets to Know Under £50 gets you solid basics with RGB. £50 to £75 is the sweet spot for value, where you get mesh panels, multiple fans, and decent build quality. £75 to £100 buys premium features like dual-chamber designs, better fan quality, and more radiator support. Don't assume spending more always means better RGB. The 1ST PLAYER Trilobite T3 at under £40 looks as good as cases costing twice the price.
RGB Software Compatibility Check whether the included fans sync with your motherboard's RGB software. ASUS Aura Sync, MSI Mystic Light, and Gigabyte RGB Fusion are the main platforms. Corsair iCUE cases use their own ecosystem. Mixing brands can cause headaches. If you're not sure, look for cases that use standard ARGB headers, which are broadly compatible.
How We Tested These Best RGB Computer Cases Under £100
Each case was assessed against a consistent set of criteria: ease of build, cable management quality, fan performance and noise levels, RGB lighting quality and software compatibility, thermal performance under load, and overall build quality. We also factored in real owner feedback from verified UK purchases to catch issues that only show up after extended use. Cases that weren't actually cases (the Raspberry Pi enclosure, the replacement panel, and the standalone fan) were included for transparency but ranked accordingly. Our goal is simple: give you honest information so you can spend your money wisely.
Best Overall
1ST PLAYER Trilobite T3
Exceptional value under £40 with ARGB fans included, solid build quality, and great lighting. The best RGB case you can buy without spending serious money.
The best RGB computer cases under £100 cover a surprisingly wide range of quality and features in 2026. Our top pick, the 1ST PLAYER Trilobite T3, proves you don't need to spend anywhere near the budget ceiling to get a genuinely impressive RGB build. For those who want the best airflow for their money, the Montech AIR 903 MAX at £60 is the clear answer, with mesh-forward design and strong fan performance that thermal-conscious builders will appreciate. If you're prepared to spend up to the £100 limit, the NZXT H9 Elite delivers premium dual-chamber aesthetics and build quality that feels like it belongs in a higher price bracket. Whatever your budget within this range, there's a solid option here. Just avoid the Raspberry Pi case and the replacement panel, which have no business being in a PC case roundup.
Frequently Asked Questions
Absolutely. The market's shifted massively in the past year. Cases like the Lian Li Lancool 217 come with five fans and proper RGB for just over £100, whilst the NZXT H9 Flow offers dual-chamber design and excellent airflow. You're not compromising on build quality at this price point anymore.
Not directly. The RGB lighting itself draws minimal power (usually under 5W total). What matters is airflow design. Some RGB cases prioritise glass panels over mesh, which can hurt thermals. The cases in our roundup all balance RGB aesthetics with proper ventilation, so you won't sacrifice cooling performance.
RGB (or non-addressable RGB) changes all LEDs to the same colour simultaneously. ARGB (addressable RGB) lets you control each LED individually, creating rainbow effects, waves, and custom patterns. Most modern cases under £100 now support ARGB headers on your motherboard for more advanced lighting control.
Most likely, yes. The cases we've tested support GPUs between 355mm and 435mm in length. Modern high-end cards like the RTX 4080 typically measure 310-340mm, so there's plenty of clearance. Always check your specific GPU length against the case specs before buying.
Not necessarily. Cases like the Lian Li Lancool 217 include five fans out of the box, whilst the NZXT H9 Flow comes with four. That's enough for most builds. You might want to add more for aesthetics or if you're running high-wattage components, but the included fans provide adequate cooling for typical gaming rigs.
