SM550 Mini-ITX PC Case for full length 2-slot GPUs
SM550Mini-ITX PC Case for full length 2-slot GPUs
  • Support Mini-ITX motherboards
  • Front panel with USB 3.1 Type C (SS+ 10 Gbit/s), USB 3.0 Type A, and Dual Audio Jacks
  • Compatible with air coolers up to 55mm tall, or some larger coolers with fan removed
  • Supports dual slot GPUs up to 305mm long x 155mm tall
  • Support SFX an SFX-L form factor power supplies
  • Mounts two 120mm x 25mm thick fans for high performance cooling
  • Magnetic dust filters available from Demcifilter
  • Designed and manufactured in the USA by Sliger
Panel Color
Panel Option (GPU Side)
Color will correspond to "Panel Color" selection above.
Panel Option (Motherboard Side)
Color will correspond to "Panel Color" selection above.
* The impact resitant acrylic we use for manufacturing these window panels has drastically increased in cost due to high demand for sneeze guard barriers during COVID-19. To offset this higher cost we have implemented a temporary $10 surcharge.
Front Panel Board Connector
* This option connects both 3.0 A and USB C ports to a single USB 3.0 motherboard header.
**This option splits the USB C and the USB A to their own motherboard headers. The USB C connects to the motherboards "USB 3.2 Gen2 Type E" header, while the USB Type A connects to the standard USB 3.0 19-pin motherboard header.
Riser Cable
*Bifurcation is the technology of splitting a single PCIe 16x 3.0 slot into two PCIe 3.0 16x slots with 8x bandwith on each.
Please confirm compatibility with your motherboard by contacting before purchasing.
Power Supply Cable
* Standard power cable restricts GPU height to 133mm (this prevents some oversized MSI and Zotac cards from being mounted)
** Pigtail power cable mount restricts GPU height to 145mm tall (this allows for taller MSI Gaming and Zotac GPUs)
Liquid Cooler Options
*645LT AIO Radiator Kits include the 92mm AIO adapter.
Please see ASETEK 92mm Radiator Installation Manual.
4x SSD Bracket (120mm fan replacement)
One of these brackets can be combined with the 92mm AIO, 1x 3.5" HDD, 1x 120mm fan or another 4x SSD bracket.
Note for all 120mm fan adapter brackets you are limited to two total, as each of these replaces one 120mm fan.
1x 3.5" HDD Bracket (120mm fan replacement)
Using this HDD kit may require an angled SATA + power adapter such as this one on Newegg.
One of these brackets can be combined with the 92mm AIO kit, one 4x 2.5" SSD bracket, one 120mm fan, or another 3.5" HDD bracket.
Note for all 120mm fan adapter brackets you are limited to two total, as each of these replaces one 120mm fan.
Add To Cart
Due to high demand orders may take up to 20 business days to ship. Please contact for order status. We expect these backorder delays to be resolved in late January 2021.
Due to changes in refund policies from PayPal and Amazon, all order cancellations are now subject to a 5% order cancellation fee.
Order Cancellations & Returns
Orders typically ship in 3-5 business days. Order ship date estimates are not based on live data, holidays and/or promotions may cause leadtimes to extend.
Please contact or call us 775 356 5595 for updates on estimated ship date.
International shipping calculated in cart. Sliger is not responsible for import duties and/or taxes.
All new cases ordered via the "configure" tab come with power switch, front panel board, feet, panels, riser, and all needed brackets included.
This section is only for adding additional parts to a new order, or for ordering replacement parts for an existing case.

Liquid Cooler Mounting Options

AMD AM4 Asetek 645LT Kit
INTEL Asetek 645LT Kit
92mm AIO Kit [Manual]

Storage Media Mounting Options

4x 2.5" SSD Kit
3.5" HDD Bracket

Power Supply Cables & Kits

12" C14 to C13 Power Cord
Standard Cord Mount
Pigtail Cord Mount

Chassis Electrical Parts

Single 19-Pin USB FPIO
Power Switch
Single PCIe 16x Flex Riser
Bifurcated PCIe Riser

Case Feet

4x Black SBR Feet
4x Chrome Feet Set

Individual Panels, Black

Panel, Top, Obsidian Black
Panel, Front, Black
Panel, Vented Side, Black
Panel, Unvented, Black
Panel, Full Window, Black

Individual Panels, White

Panel, Top, White
Panel, Front, White
Panel, Vented Side, White
Panel, Unvented, White
Panel, Full Window, White

Individual Panels, Grey

Panel, Top, Slate Grey
Panel, Front, Grey
Panel, Vented Side, Grey
Panel, Unvented, Grey
Panel, Full Window, Grey

Technical Specifications

  • Mini-ITX (170mm × 170 mm)
  • Not compatible with Mini-DTX boards such as the ASUS ROG Crosshair VIII Impact AM4
CPU Liquid Coolers
  • 92mm Asetek 645LT
  • Requires 92mm AIO adapter plate
CPU Air Coolers
  • Maximum of 55mm tall CPU coolers
  • Coolers that require a Vented Side Panel on the CPU side
  • AMD Wraith Stealth (54mm)
  • Cooltek LP53 (53mm)
  • Coolers compatible with all side panel types (Unvented, Window, or Vented)
  • Alpenföhn® Black Ridge (47mm)
  • Noctua L9i/L9a
  • Intel Boxed Cooler
  • ID-COOLING IS-47k (47mm)
  • Cryorig C7 CU
  • Cryorig C7
  • Cooltek ITX30
  • Phanteks PH-TC90LS
  • Silverstone AR05
  • Silverstone AR11
  • SEMI-PASSIVE MODE: requires Unvented or Window panels on both sides, and two high static pressure 120mm fans
  • Phanteks PH-TC12LS (FAN REMOVED)
  • Noctua NH-L9x65 (FAN REMOVED)
  • Scythe SCSK-1100 Shuriken Rev. B (FAN REMOVED)
  • SCYTHE Big Shuriken 3 CPU Cooler SCBSK-3000 (FAN REMOVED)
  • Thermalright AXP-100H Muscle (FAN REMOVED)
  • Thermalright AXP-100 Copper(FAN REMOVED)
  • Cooltek CR-701 (FAN REMOVED)
Fan Mounting
  • 2x 120mm Fans
  • Fans can be a maximum of 25mm thick
  • 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
  • 2x Noctua NF-F12 (recommended)
GPU / PCIe Cards
  • Supports two(2) 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
  • Maximum card length: 305mm
  • Maximum card width: 2 slot, up to 50mm [email to verify fit]
  • with Pigtail Inlet (recommended for MSI and ZOTAC cards)
  • Maximum card height: 157mm
  • Maximum card length: 305mm
  • Maximum card width: 2 slot, up to 50mm [email to verify fit]
  • 157mm of height for GPU power connectors regardless of power cord option
  • (2x) 2.5" SSD/HDD mounting points behind front panel
  • Optional (4x) 2.5" SSD/HDD mount bracket [replaces 1x 120mm bottom fan]
  • Maximum two brackets for total of 8x 2.5" SSD/HDDs
  • Optional (1x) 3.5" HDD mount bracket [replaces 1x 120mm bottom fan]
  • Maximum two brackets for (2x) 3.5" HDD in bottom of case
Power Supply
  • SFX
  • Corsair SF series (up to 750W)
  • SilverStone SST-SX series (up to 650W)
  • EVGA SuperNOVA GM series (up to 650W)
  • FSP Dagger series (up to 600W)
  • 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.
  • It is recommended to mount your PSU with the fan intake facing the GPU for best thermals.
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
  • Powder coated chassis and panels
Case Dimensions (LxWxH)
  • 13.19" x 5.48" x 8.18" - LxWxH
  • 335mm x 139mm x 208mm - LxWxH
  • 9.68 Liters
  • Volume includes case feet and all protruding flanges
  • Base Chassis (includes power cord and riser)
  • 4.55lbs
  • Window Panels
  • 0.75lbs each
  • Vented Panels
  • 0.50lbs each
  • Unvented Panels
  • 0.80lbs each
  • Packaging Material
  • 1.30lbs 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
  • SM550-A (3/1/19 - X/X/XX)
  • Initial Release
More pictures coming soon!