SM580 Mini-ITX PC Case for 280mm AIOs and 3-slot GPUs
SM580Mini-ITX PC Case for 280mm AIOs and 3-slot GPUs
  • Supports Mini-ITX motherboards
  • Front panel with USB 3.1 Type C (SS+ 10 Gbit/s), USB 3.0 Type A, and Dual Audio Jacks
  • Upper plenum for mounting one 280mm AIO liquid cooler or two 140mm / 120mm liquid coolers
  • Three slot GPUs up to 328mm long, SFX or SFX-L form factor power supplies, 2x 2.5" SSD
  • Optional brackets for up to 5x 3.5" HDDs and/or bottom 120mm radiator
  • Mounts two 140mm fans in bottom for high performance cooling
  • Magnetic dust filters available from Demcifilter
  • Designed and manufactured in the USA by Sliger


Some parts and accessories, listed below, are still available for existing case owners. Be on the look out for a new version of this case in late 2024!


Chrome Handle V2
Black Handle V2

Power Cables & Kits

Both PCord Covers
12" Power Cord

Chassis IO Parts

FPIO with USB C Header
Single 19-Pin USB FPIO
16mm Power Button

PCIe Risers & Brackets

PCIe 3.0 16x Standard
PCIe 3.0 Offset Bracket


4x Round Black SBR Feet
4x Square SBR Feet

3.5" Hard Drive & 2.5" SSD Brackets

120mm fan or 3.5" HDD
2x 3.5" HDD Bracket
Front SSD Bracket

Case Frame Parts

SM5XX 3-Slot Screw Kit
Subtop, Rectangle Perf.

Top Panels

Panel, Top, Obsidian Black
Panel, Top, Slate Grey
Panel, Top, White

Front Panels

Panel, Front, Black
Panel, Front, Grey
Panel, Front, White

Vented Side Panels

Panel, Vented Side, Black
Panel, Vented Side, Grey
Panel, Vented Side, White

Technical Specifications

  • Mini-ITX (170mm × 170 mm)
  • Not compatible with Mini-DTX boards such as the ASUS ROG Crosshair VIII Impact AM4
Liquid Cooling
  • AIO Liquid Cooler Compatibility List
  • Click here for full AIO Compatibility Spreadsheet [Google Docs]
  • 1x 280mm AIO or radiator
  • Maximum 328mm x 150mm x 72mm (LxWxH -- 72mm height includes fan and radiator thickness)
  • RECOMMENDED: ASETEK 680LS, NZXT Kraken X61, X62, or Z63, Cougar Aqua 280, ThermalTake Floe Ring 280
  • DIFFICULT: Corsair Hydro H115i Platinum RGB, EVGA CLC 280mm, Corsair H115i Extreme, Fractal Design S28+
  • INCOMPATIBLE: Cooler Master Liquid Pro 280, ARCTIC Liquid Freezer II 280, AORUS RGB AIO 280, be quiet! Pure Loop 280
  • 1x 240mm AIO
  • 2x 120mm AIO
  • 1x 120mm + 1x 140mm AIOs (ex: 1x GPU, 1x CPU)
  • 1x 120mm or 1x 140mm AIO with 1x of the optional 2x 3.5" HDD brackets
  • Bottom Fan Plenum
  • 1x 120mm radiator less than 27mm thick with 15mm thick fan
  • Prefilled AIO are not recommended here, recommended for custom loops only.
  • Maximum of 55mm tall CPU pump blocks
CPU Air Coolers
Fan Mounting
  • 2x 140mm fans in bottom plenum
  • Fans can be a maximum of 27mm thick
  • 2x 140mm fans on top radiators or without radiator.
  • Recommended airflow is bottom intake, top exhaust
  • For any (FAN REMOVED) heat sinks listed above both fans must be populated with high static pressure fans
GPU / PCIe Cards
  • Community Generated GPU Compatibility Lists
  • NVIDIA GTX/RTX GPU Compatibility Spreadsheet [Google Docs]
  • AMD Radeon GPU Compatibility Spreadsheet [Google Docs]
  • Supports three(3) slot wide cards with room between side panel and card for airflow
  • Card is mounted behind motherboard on a PCIe 3.0 16x Flexible Ribbon Riser
  • with Standard Inlet
  • Maximum card height: 133mm (157mm for power connectors)
  • Maximum card length: 328mm
  • Maximum card width: 67mm
  • with Pigtail Inlet
  • Maximum card height: 157mm
  • Maximum card length: 328mm
  • Maximum card width: 67mm
  • Bifurcation riser limits the outer PCIe 16x 2.0 card to 2 slots wide, and inner slot to a single slot card.
  • Bifurcation outer slot maximum card width: 47mm
  • (2x) 2.5" SSD/HDD mounting points behind front panel
  • Optional (4x) 2.5" SSD/HDD mounting bracket [replaces 1x 140mm bottom fan]
  • Maximum two brackets for total of 8x 2.5" SSD/HDDs
  • Optional (1x) 3.5" HDD mount bracket [replaces 1x 140mm bottom fan]
  • Maximum two brackets for (2x) 3.5" HDD in bottom of case
  • Optional (2x) 3.5" HDD mount bracket (top of case)
  • Maximum two brackets for total of 4x 3.5" HDDs in top of case
  • Total maximum of (6x) 3.5" HDDs
Power Supply
  • SFX
  • Corsair SF series
  • SilverStone SST-SX series
  • EVGA SuperNOVA GM series
  • FSP Dagger series
  • SFX-L is supported, however it is a very tight fit and not recommended.
  • Sliger recommends a fan guard grill or custom cables if you do go with SFX-L.
Front Panel I/O
  • One USB 3.1 Gen 2 Type C to USB E header (SS+ 10 Gbit/s)
  • One USB 3.0 Type A to 20-Pin Motherboard Header
  • Two Audio Jacks to standard 9-Pin HD AUDIO header
  • Chassis
  • ASTM-A-653 G30 Zero Spangle 20 Gauge Galvanized Steel
  • Side Panels
  • ASTM B209-10 5052-H32 0.080" Aluminum Sheet
  • Feet
  • Cavity Molded 75 Durometer Nonmarking Black SBR
  • Fine texture powder coated chassis and panels
  • Unpainted chassis, panels, or parts available on request (for DIY paint jobs)
  • Optional custom powder coat finishes, MOQ 25 units
  • Case is unbranded on interior and exterior of chassis.
  • Optional logo screen printing (full color) on front panel for business customers, MOQ 5 units
Case Dimensions (LxWxH)
  • 14.05" x 6.10" x 11.30" - LxWxH
  • 357mm x 155mm x 287mm - LxWxH
  • 15.88 Liters
  • Volume includes case feet and all protruding flanges
  • Base Chassis (includes power cord, riser, front panel, top panel, power switch, etc.)
  • 5.50 lbs
  • Window Panels
  • 1.10 lbs each
  • Vented Panels
  • 0.70 lbs each
  • 1x Kensington Lock Cutout
  • Case
  • 5 Year Warranty [Chassis, USB cables, Power Button, Power Cable, PCIe Riser]
  • Liquid Coolers & Fans
  • 3 Year Warranty
  • Please see our warranty policy for additional conditions, exclusions, and limitations.
  • HTS Tariff Code
  • 8473.30.00.02
  • Country of Origin
  • United States of America
Rev Control
  • SM580 V1-A (7/8/19 - 12/31/19)
  • Initial Release
  • SM580 V1-B (1/1/20 - 8/23/21)
  • Removed rear obround vent pattern.
  • Removed 1-inch holes and plastic caps from rear of case.
  • SM580 v1.1 (8/23/21 - **/**/**)
  • Added Link-Up PCIe 4.0 Riser
  • Chassis subtop changed to rectangular video
  • Discontinued non-vented side panels
  • All cases now get both Pigtail and Standard power cord inlet covers
  • New User Manual