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 (Includes PCIe Gen 3.0 16x cable)
  • 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

We Are Moving!

Website Sales are Temporarily Suspended

Sliger is moving and will be back in operation soon!

  • Effective October 17th, 2022 Sliger is beginning work on relocated its offices and manufacturing facilities.
  • When we do reopen, we expect very high demand. Please plan for orders to take up to 5 weeks to be fulfilled.
  • To offset this, all products are open for backorder and will be fulfilled on a first-come/first-serve basis.
  • We expect to complete our move by December 12th, 2022 and for backorder status to be lifted in January of 2023.
  • If you need to cancel a backorder please note that our standard 5% order cancellation fee still applies.
  • For questions or existing order status, please email us at

Business Customers

System Builders, Integrators, VARs, ISVs, and OEM/ODMs

  • This temporary pause and back order does not apply to existing or new business customers.
  • This pause / backorder on consumer facing sales is being done to allocate more of our limited time and inventory to our business customers.
  • We are maintaining a substantial buffer stock specifically for business customers.
  • Please email us at to place orders, request samples, or discuss new projects.

Warranty and Support

All warranty and support services will continue operating as normal.

  • Sliger warranty, part sales, and tech support is still available during this temporary sales pause.
  • Please email us at for warranty claims, tech support, or RMAs.

New Address

Please update your contact information!

  • Our new address will be:
  • 778S 100W, Smithfield, Utah 84335

If any urgent needs or questions please call us at +1 775 356 5595

Panel Color
Panel Option (GPU Side)
Non-vented solid aluminum panels are available upon request. Color will correspond to "Panel Color" selection above.
Panel Option (Motherboard Side)
Non-vented solid aluminum panels are available upon request. Color will correspond to "Panel Color" selection above.
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.
*Our current PCIe Gen 3.0 risers have limited PCIe Gen 4.0 compatability. Gen 4.0 cards are able to get to BIOS and change to 3.0 mode. Some 4.0 cards such as 3060 and 3070 will run in 4.0 mode on these risers.
120mm Fans
* Fan extensions and gaskets/grommets are not included. Fan mounting screws are included.
Liquid Cooler Options
*645LT AIO Radiator Kits include the 92mm AIO adapter.
Please see ASETEK 92mm Radiator Installation Manual.
**120mm AIO kit is limited to 54mm thick radiator + fans, kit also limits GPU length to 187mm.
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 changes in refund policies from PayPal and Amazon, all order cancellations are now subject to a 5% order cancellation fee.
Order Cancellations & Returns
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.

Case Handles*

Chrome Handle V2
Black Handle V2

Top Panel Assemblies (with handle support)

Panel, Top, Handle, Black
Handle Top Panel, Grey
Handle Top Panel, White

Liquid Cooler Mounting Options

92mm AIO Kit [Manual]
120mm AIO Adapter

Storage Media Mounting Options

4x 2.5" SSD Kit
3.5" HDD Bracket
Front SSD Bracket

Power Supply Cables & Kits

12" Power Cord
Both PCord Covers

Chassis Electrical Parts

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

PCIe Risers & Brackets

PCIe 3.0 16x Standard
PCIe 4.0 16x Standard
Bifurcated 3.0 (8x/8x)
PCIe 3.0 Offset Bracket
PCIe 4.0 Offset Bracket

Case Feet

4x Chrome Feet Set
4x Round Black SBR Feet
4x Square SBR Feet

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

Non-vented Side Panels

Panel, Unvented, Black
Panel, Unvented, Grey
Panel, Unvented, White

Acrylic Window Side Panels

Panel, Full Window, Black
Panel, Full Window, Grey
Panel, Full Window, White

Top Panel Assemblies (no handle support)

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

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
  • Compatible with all GPUs
  • 120mm AIO liquid coolers
  • Requires 120mm AIO kit
  • 120mm radiator thickness + 120mm fan thickness must be < 54mm (54mm is contact with side panel)
  • CPU pump block / coolant hoses must be < 55mm tall from CPU
  • Limits GPU length to 187mm long
CPU Air Coolers
Fan Mounting
  • 2x 120mm x 25mm Fans
  • Builds with Window, Unvented, or a mix of Window/Vented panels must use bottom intake / top exhaust.
  • Builds with vented side panels (both sides) are recommended to exhaust out bottom of case.
  • For any (FAN REMOVED) heat sinks listed above both fans must be populated with high static pressure fans
  • 2x Noctua NF-A12x25 (recommended)
GPU / PCIe Cards
  • Community Generated GPU Compatibility Lists
  • NVIDIA GTX/RTX GPU Compatibility Spreadsheet [Google Docs]
  • AMD Radeon GPU Compatibility Spreadsheet [Google Docs]
  • 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
  • Case includes two power cord mounting plates, Standard and Pigtail
  • 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
  • 120mm AIO kit limits GPU to 187mm length.
  • (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
  • 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
  • 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)
  • 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 v1 (3/1/19 - 8/23/21)
  • Initial Release
  • SM550 v1.1 (8/23/21 - **/**/**)
  • Added handle bracket options
  • Added 120mm AIO mounting kit
  • Added Link-Up PCIe 4.0 Riser
  • Increased venting on rear of case
  • Discontinued non-vented side panels
  • All cases now get both Pigtail and Standard power cord inlet covers