What are the supported motherboard sizes for this rackmount chassis?

The RM31 supports SSI-EEB, SSI-CEB, Extended ATX, ATX, Micro-ATX, and Mini-ITX motherboards, with compatibility up to SSI-EEB noted in the product description.

What size liquid cooling radiator can the RM31 support in the front, and how many 120mm fans can it fit for push/pull cooling?

The RM31 supports front radiators up to 360mm, and it can fit up to 6x120mm fans for push/pull cooling.

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Silverstone Technology RM31 3U rackmount server chassis with dual power supplies and 360mm radiators support

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Compatible with motherboards up to SSI-EEB
Supports dual SFX-L or 2U CRPS redundant power supplies
Provides 8 full-height PCI expansion slots
Supports 360mm liquid cooling radiators up to 6x120mm push and pull fans
Supports CPU air coolers up to 110mm in height
Includes one USB Type-C port

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Silverstone Technology RM31 3U rackmount server chassis with dual power supplies and 360mm radiators support

Model
Brand	SilverStone
Model	RM31
Part Number	SST-RM31

Details
Chassis Type	Rackmount Server Chassis
Form Factor	3U
Color	Black
Case Material	Steel
Motherboard Compatibility	SSI-EEB, SSI-CEB, Extended ATX, ATX, Micro-ATX, Mini-ITX
Power Supply	Primary PSU slot: SFX/SFX-L or 2U CRPS Redundant; Secondary PSU slot: SFX/SFX-L
LED Indicators	Power status x1: Blue, HDD activity x1: White, LAN activity x2: Green

Expansion
Expansion Slots	8
Max CPU Cooler Height	110mm
Max GPU Length	458mm (without front fans/radiators)
Max PSU Length	Primary: 250mm, Secondary: 140mm

Ports
Front Ports	USB Type-C x1, USB 3.0 x2

Cooling System
Radiator Options	Front: 120mm / 240mm / 360mm
Fan Options	Front: 120mm x3, Rear: 60mm x2

Features
Features	Supports dual SFX/SFX-L or 2U CRPS redundant power supplies, supports 360mm radiator with 6x120mm push/pull fans, side switch for chassis intrusion security

Dimensions & Weight
Dimensions	438mm (W) x 132mm (H) x 488mm (D), 17.24in x 5.20in x 19.21in

Additional Information
First Listed on Newegg	September 23, 2026

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Limited Warranty period (parts): 1 year
Limited Warranty period (labor): 1 year
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Return Policies

Return for refund within: 30 days
Return for replacement within: 30 days
This item is covered by Newegg.com's 30-Day Return Policy.
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Silverstone Technology RM31 3U rackmount server chassis with dual power supplies and 360mm radiators support

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Customer Reviews of the SilverStone RM31

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Warranty, Returns, And Additional Information

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Manufacturer Contact Info

Item#: 2S7-03A1-000C1

Best Sellers

Silverstone Technology RM31 3U rackmount server chassis with dual power supplies and 360mm radiators support

Learn more about the SilverStone RM31

Customer Reviews of the SilverStone RM31

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info