Cooler Master COSMOS ALPHA Silver Full Tower Tempered Glass PC Case
Cooler Master COSMOS ALPHA Silver Full Tower Tempered Glass PC Case
Scan code: LN168576 Manufacturer code: C700-KGNN-S00
£299.99Item due on 03 July 2026
Due 3rd Jul
  • Thumbnail 1 : Cooler Master COSMOS ALPHA Silver Full Tower Tempered Glass PC Case
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  • Cooler Master COSMOS ALPHA Silver Full Tower Tempered Glass PC Case : video thumbnail 1

Cooler Master COSMOS ALPHA Silver Full Tower Tempered Glass PC Case

Cooler Master COSMOS ALPHA Chassis, Silver, Full Tower, 2x 200mm Fans, USB 3.2 Gen2x2, mITX / mATX / ATX / E-ATX / EEB

Scan code: LN168576 Manufacturer code: C700-KGNN-S00
£299.99
Item due on 03 July 2026
Due 3rd Jul
Pay in 3 interest-free payments of £100.00

Email me when the availability or price changes

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Finance this product

  • From £14.65 / month (APR 16.9%) for 24 months or 0% for 4 months
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  • SCANPROTECT Protect against installation damage for 28 days.
  • 48HR REPLACEMENT If you need to return this item, your replacement will be dispatched within 2 working days of your product arriving back at Scan.

Suggested Alternatives

COSMOS ALPHA Enthusiast RGB Full Tower from Cooler Master

Angled shot of COSMOS ALPHA

The Future is NowTwisting dimensions and conventions, the COSMOS ALPHA combines a curved aluminium frame, tempered glass panels, and under-case lighting with a fully reconfigurable interior that moves with you. Dual fold-out doors reveal a futuristic rail-based system where the motherboard tray and fan brackets freely slide into position, letting you reshape airflow, showcase hardware, or switch between air and liquid cooling without tearing the build apart. With support for E-ATX/EEB platforms, 400 mm GPUs, up to 15 fans, and radiators reaching 420 mm, the ALPHA delivers serious thermal capacity inside its striking, spaceship-like structure not quite from this world.

Designed to Innovate

Upwards clipping of full case build with argb riser cable and air cooler

FreeForm 2.0The COSMOS philosophy has always been about transcending limits of what a PC case should be, and the COSMOS ALPHA carries that forward as a true “halo” platform for builders who want complete control.

It carries forward the signature curved aluminium form while evolving FreeForm 2.0 into something more deliberate — every internal component can rotate or flip, turning layout into a choice rather than a constraint. This is where scale, modularity, and personal expression meet, giving builders the freedom to shape not just a PC, but their own interpretation of it.

Modular Sliding Rail System

video of MAG motherboard on motherboard tray being slid in and out
view of sliding board tray from alternate side showing cable clearance

Movable Fan BracketsFan brackets don’t just sit in place — they slide along rails, letting you shift cooling closer to GPUs, radiators, or hotspots as your hardware demands. It gives you direct control over airflow placement, turning cooling from a fixed setup into something you can actively adjust.

movable radiator brackets along the alternate side
fan brackets being moved inwards and outwards along case

Sliding Motherboard TrayThis modularity extends to the motherboard tray, which slides to change how space is allocated inside the chassis. You can push it to open up clearance for larger cooling setups or pull it in to tighten the layout and bring components into focus. It makes switching between air and liquid cooling layouts far more practical.

Optimised Thermal Architecture

highlighted fan clearance

Fan CompabilityCooling starts strong with a pre-included pair of 200mm intakes and a 120mm exhaust fan, delivering high airflow straight out of the box. The case scales far beyond that baseline though, supporting up to 15 fans across front, top, rear, bottom, and side mounts, with compatibility spanning 120 mm, 140 mm, 180 mm, and 200 mm sizes to suit a wide range of airflow strategies.

highlighted radiator clearance

Radiator ClearanceRadiator support matches that flexibility, with up to 360mm supported on both the top and bottom, with expanded capacity on the side mount with support for 420 mm or even triple 360 mm configurations. This gives builders the space to deploy colossal multi-radiator liquid cooling setups, with enough clearance to handle thicker radiators where needed.



Control Over Clearance

highlighted motherboard clearance

From ITX to EEBCOSMOS ALPHA is ready to take on most hardware you throw at it, providing standoffs and space for mini-ITX, microATX, ATX, E-ATX and SSI-EEB motherboards on the sliding tray.

53 mm of cable routing space behind the tray keeps everything clean as configurations evolve. Support for GPUs up to 400 mm and ATX PSUs sets the foundation for past, present and future components.

A branded, solid metal support bar guides your GPU along the case seamlessly as well, allowing you to tighten it in place to whichever degree feels right.



400mmMax. GPU Clearance

186mmMax. Air Cooler Height

240mmMax. PSU Length

Next-Gen Connectivity

Annotated front IO from top

Modern PortsSituated on the top, above a futuristic, rounded button panel, the I/O includes four USB 3.2 Gen1 Type-A (5G) and two USB 3.2 Gen2x2 Type-C (20G) ports, offering high-speed connectivity for modern peripherals and storage devices.

Specifications
Core Chassis Specifications
Case Edition COSMOS ALPHA
Case Form Factor Full Tower
Motherboard Form Factor
  • ATX
  • E-ATX
  • MicroATX
  • Mini-ITX
  • SSI EEB
Back Connect Compatible No
I/O, Bays & Expansion
Front/Side/Top Panel I/O
  • 1 x Headphone/Mic Combo
  • 4 x USB 3.2 Gen1 Type-A
  • 2 x USB 3.2 Gen2x2 Type-C
Drive Bays 2 x 3.5" / 2x 2.5" Internal
Standard Expansion Slots 8
Vertical Expansion Slots  
Fans & Filters
Fan Bays
  • 3 x 120mm
  • 3 x 120mm / 3x 140mm / 2x 200mm
  • 9 x 120mm / 7x 140mm / 6x 180mm / 6 x 200mm
Fans Included
  • 1 x 120mm
  • 2 x 200mm
Fan Controller/Hub  
Dust Filters
  • Bottom
  • Front
  • Side
  • Top
Liquid Cooling Support
Front Radiator Compatibility  
Top Radiator Compatibility 1 x 120/140/240/280/360mm
Bottom Radiator Compatibility 1 x 120/140/240/280/360mm
Rear Radiator Compatibility  
Side Radiator Compatibility 1 x 120/140/240/280/360/420mm
Clearances
Max CPU Cooler Height 186 mm
Max GPU Card Length 400 mm
Cable Routing Space 53 mm
Side Panels
Window/s Yes
Window Configuration 1 x Main Side
Window Construction Tempered Glass
LED Lighting Functionality
LED Lighting Yes
LED Lighting Emitters Included LED Light Strip/s
LED Lighting Colour RGB
LED Lighting Support & Control  
Power Supply Compatibility
PSU Included No
PSU Wattage (If Included)  
PSU 80+ Rating (If Included)  
PSU Support ATX
PSU Mounting Location Bottom Mount, Rear
Max PSU Length 240 mm
Chassis Physical Specifications
Colour Black/ Silver
Chassis Construction Materials SGCC / Plastic / Aluminium
Front Panel Type Mesh
Dimensions 330 x 639 x 669 (WxHxD mm)
Weight 27.5 kg (Approx)
Package Type Retail
Please Note  
Additional Information
Scan Code LN168576
Model Number C700-KGNN-S00
GTIN 4719512162712
Warranty

Please note your statutory rights are not affected.

For further information regarding Scan's warranty procedure please see our terms and conditions

Details
Duration:
24 months
Type:
Return to base
DOA Period:
28 days
RTB Period:
24 months
Manufacturer Contact Details
Telephone:
01204-474747
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Buying Guide
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Chassis Airflow
Date Issued: 20th Oct 2008

The modern PC is potentially a mass of heat output and heat production hot spots. With CPUs rated at more than 100W of heat output, single graphics boards carrying similar ratings (and people want to run two!), multiple hard drives the norm, lots of memory and mainboards covered in heatpipes to combat toasty core logic and PWM circuits, a PC appreciably warming up a room when it’s working hard is no joke.

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Watercooling
Watercooling
Date Issued: 19th Jun 2008

Watercooling for the PC has been around for years in some form or another, for at least as long as Scan have been in business, with basic physics defining why you want to use it. That means for air cooling, to cope with increasing temperature in the heatsink you need to move the air across it faster. That is why thermostatically controlled fans in your PC will turn faster the hotter something gets.

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Cooler Master COSMOS ALPHA Silver Full Tower Tempered Glass PC Case
Cooler Master COSMOS ALPHA Silver Full Tower Tempered Glass PC Case

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Cost of purchase: £299.99
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Cost of purchase: £299.99
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