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ASRock RB1U2M2-G4 M.2 1U Riser, M.2 to PCIe

 

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ASRock
Part no RB1U2M2_G4
Ascent part no 798327
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The ASRock Rack RB1U2M2-G4 is a PCIe Gen4 M.2 riser card designed for server and workstation platforms. It supports up to two M-Key PCIe 4.0 x4 NVMe M.2 solid state drives, enabling high-speed storage solutions within a compact form factor. This riser utilises a standard PCIe slot to provide direct signal paths for maximum bandwidth, making it ideal for expanding high-performance SSD storage capacities in rackmount servers or compatible desktops. The design features durable construction, a low-profile bracket, and optimal placement for efficient airflow within a 1U chassis.

Technical Specifications

Product NameASRock Rack RB1U2M2-G4 M.2 Riser Card
ManufacturerASRock Rack
Model NumberRB1U2M2_G4
Product LineRB1U2M2 Series
Product CategoryDrive Enclosures
PRODUCT TYPE
Product TypeDrive Bay Adapter (PCIe M.2 Riser Card)
DRIVE BAYS
Supported Drives2 x M-Key M.2 NVMe SSDs
DRIVE INTERFACE
Drive InterfacePCI Express 4.0 x4 (per M.2 slot), NVMe (Not SATA compatible)
DRIVE SIZE
Supported M.2 Form Factors2242, 2260, 2280 (Single-sided M.2 modules only)
FORM FACTOR
Form FactorInternal (Mounts to standard PCIe slot in a 1U/2U rack or compatible chassis)
HOST INTERFACE
Host InterfacePCI Express 4.0 x8 lane slot (occupies one PCIe x8 slot; provides 2 x4 lanes to SSDs)
EXTERNAL CONNECTION
External ConnectionNone (Internal use only)
CHASSIS COMPATIBILITY
Chassis CompatibilityPrimarily designed for ASRock Rack and other compatible 1U/2U rackmount servers
COOLING
CoolingPassive (relies on server airflow); no fans or heatsinks included
PHYSICAL
Bracket TypeLow-profile bracket included
DimensionsApprox. 170 mm x 55 mm (varies based on documentation and actual measurement)
Warranty Information3 years (standard ASRock Rack limited warranty; may vary by region — confirm with retailer)
Overall SentimentGenerally positive: The RB1U2M2-G4 is well-reviewed as a high-performance, reliable way to add NVMe SSDs via M.2 in professional server and workstation environments.

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ASRock
Part no RB1U2M2_G4
Ascent part no 798327
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