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Silver micro-ATX aluminium case with tempered glass side panel and built-in 140 mm front and 120 mm rear fans

Corn Electronics

Corn Electronics UMX3 Micro-ATX Aluminium Tempered Glass PC Case Silver

SKU CH-YPQV-V8PSW MPN UMX3

Micro-ATX aluminium chassis with built-in 140 mm and 120 mm fans, 320 mm GPU clearance and 163 mm CPU cooler height

  • Max graphics card length320 mm
  • Power supply mountingTop
  • Supported motherboard sizesMicro ATX / ITX
  • Side panel typeWith Side Window
  • 5.25-inch external bays1 × 3.5 in, 3 × 2.5 in Or 4 × 2.5 in
  • Expansion card slots4
  • Premium aluminium-magnesium shell gives a rigid, lightweight chassis
  • Built-in 140 mm front and 120 mm rear fans plus radiator mounts deliver strong airflow
  • Fits graphics cards up to 320 mm and CPU coolers up to 163 mm for high-end builds
  • Tool-less glass side panel and front USB 3.0 ports make access and connectivity simple
  • Compact 188 × 358 × 365 mm footprint suits Micro-ATX and Mini-ITX motherboards

Compact aluminium chassis for Micro-ATX builds

The UMX3 is a silver Micro-ATX and Mini-ITX case built from 2.0mm aluminium magnesium alloy with a 1.0+1.2 mm SGCC steel internal structure. A full tempered glass side window shows the interior. It fits graphics cards up to 320mm long and CPU coolers up to 163mm tall.

Builders who need dense storage

This case suits users wanting a premium small-form-factor enclosure with strong cooling potential. It is not for builders who need more than four 2.5-inch drives or a single 3.5-inch bay. It is not for systems requiring a power supply longer than 160mm.

320 mm maximum graphics card length

The 320mm GPU clearance is the critical dimension that decides if your card fits. Measure your graphics card before purchase; longer models will not install in this chassis.

How it compares

Measured against everything we stock in Tower & Desktop PC Cases, at today’s prices. Recalculated every night.

Price $151.99
Pricier than about 71% of the 1,468 comparable items (median $100.99).
Max graphics card length 320 mm
Lower than about 89% of the 894 comparable items (median 400 mm).

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Specifications

Product
Brand nameJonsbo
Model nameUMX3-PLUS(Window version)
Product typeMicro ATX / Mini-ITX
Product colorSilver
Storage
5.25-inch external bays1 × 3.5 in, 3 × 2.5 in Or 4 × 2.5 in
Ports & slots
Expansion card slots4
Front panel portsUSB 3.0 × 2,USB 2.0 × 2,Audio×1,MIC×1
Power
Power supply includedNo
Size & build
Max graphics card length320 mm
Power supply mountingTop
Side panel typeWith Side Window
Fan mounting options1 × 140 mm fan (built-in)(140 mm radiator can be installed ); Back:1 × 120 mm fan (built-in) (120 mm radiator can be installed )
Compatibility
Supported motherboard sizesMicro ATX / ITX
CPU cooler height limit163 mm
PSU length limitPSII (Modular or non-modular PSU which is shorter than 160 mm)

Questions about this item

Does the case come with a power supply or do I need to buy one separately?

No power supply is included; you must buy a PSII unit shorter than 160 mm, modular or non-modular

How do I choose between the 3.5-inch and 2.5-inch drive layouts?

The bay holds either one 3.5-inch drive plus three 2.5-inch drives, or four 2.5-inch drives — pick the 3.5-inch combo if you need a large mechanical disk, otherwise the all-2.5-inch layout gives more SSD slots

Will a 320 mm graphics card and a 163 mm CPU cooler fit together in this build?

Yes, the chassis allows up to 320 mm GPU length and 163 mm cooler height simultaneously, so most full-size dual-slot cards and top air coolers clear each other

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