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Silverstone RM51 5U Rackmount Case NO PSU

Web ID: 38171

Supports up to SSI-EEB motherboards
Includes 2 x Air Penetrator 184i PRO fans for superior air intake
Supports 360mm liquid cooling radiator
8 PCI expansion slots
Reserved sliding rail mounting holes for quick rail installation
Includes one USB Type-C interface
Upright or horizontal placement flexibility
Secondary PSU can be installed if 3.5" drive cage is to be left unoccupied

Manufacturer Warranty: 1 Year
Manufacturer PN: SST-RM51
Manufacturer Website


silverstone rm51 5u rackmount case

Model No.


Chassis form factor



SSI-EEB, SSI-CEB, Extended ATX, ATX, Micro-ATX, Mini-ITX



Drive Bay


  • 3.5" x 2 (compatible with 2.5" x 3) + 3.5" x 2 (compatible with SFX PSU)
    2.5" x 4

Power Supply

Primary PSU slot: PS2 (ATX) / Mini Redundant
Secondary PSU slot: SFX (occupies 3.5" bracket)

Limitation of PSU

(Removal of 3.5" drive cage eliminates PSU depth limitation)

Cooling system


  • 120mm x 3 / 180mm x 2
    (2 x Air Penetrator 184i PRO fans included)


  • Rear I/O: 120mm x 1 / 140mm x 1
    Rear fan cage: 80mm x 2

Radiator support


  • 120mm x 3 / 120mm x 1 + 240mm x 1 / 360mm x 1 (120mm x 3) / 360mm x 1 (180mm x 2)


  • 120mm x 1

Limitation of CPU cooler

Height w/ expansion card retainer: 181mm
Height w/o expansion card retainer: 192mm

Expansion card

Length: 455mm (without installing front fans and radiators)
Width w/ expansion card retainer: 157mm
Width w/o expansion card retainer: 198mm

Expansion Slot


Front I/O Port

USB Type-C x 1
USB 3.0 x 2

LED indicator

Power status x 1
HDD activity x 1
LAN activity x 2


Incl. rear fan cage: 440mm (W) x 220mm (H) x 530mm (D), 51.3 liters
Excl. rear fan cage: 440mm (W) x 220mm (H) x 485mm (D), 46.95 liters
Incl. rear fan cage: 17.3" (W), 8.66" (H), 20.87" (D)
Excl. rear fan cage: 17.3" (W), 8.66" (H), 19.1" (D)

Net Weight

10.6 kg


Side switch for chassis intrusion security