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Black metal 5.25 inch backplane with four drive carriers and a fan

Athena Power

Athena Power BP-U24NVMEO525 5.25" 4-bay NVMe U.2 backplane

SKU CH-AEXY-SR3RJ

A 5.25-inch backplane holds four 2.5-inch NVMe U.2 drives with Oculink connectors and a built-in fan

  • Size5.25 in (13.3 cm)
  • Drive interfaceNVMe U.2
  • Bay count4
  • Power details12 V/2A, 3V3/0.5A
  • Product colorBlack
  • Product typeEnclosure
  • 25" bay holds four NVMe U.2 drives
  • Four Oculink SFF-8611 connectors for direct drive links
  • Metal frame with stainless-steel carriers protects drives
  • Tool-free sliding trays enable quick drive swaps
  • 163 x 146 x 42 mm compact footprint fits standard bay

5.25" 4-bay NVMe U.2 backplane

This Athena Power BP-U24NVMEO525 backplane occupies a single 5.25" bay and holds four 2.5" NVMe U.2 drives in individual metal carriers. Sliding trays with vibration-reducing springs allow quick drive swaps without tools. A built-in fan provides active cooling for sustained workloads.

Suits builders adding dense U.2 storage.

The unit targets workstations or servers that can accept a 5.25" front bay and have Oculink SFF-8611 host ports available. It does not support M.2 form-factor drives, nor does it include a host adapter or external cabling. Buyers without Oculink connectivity on their motherboard or HBA should look at alternative enclosure types.

Four Oculink SFF-8611 host connectors

Each of the four drive bays connects through a dedicated Oculink SFF-8611 link, enabling Gen3 32 Gbps and Gen4 64 Gbps throughput per drive. Two 15-pin power connectors feed the backplane and carriers. This connector count and interface are the primary compatibility check before purchase.

How it compares

Measured against everything we stock in External Drive Enclosures, at today’s prices. Recalculated every night.

Price $222.99
Pricier than about 90% of the 821 comparable items (median $30.99).

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Specifications

Product
Brand nameAthena Power
Product lineM2U2 Series
Model nameU.2 SSD Enclosure
Part numberBP-U24NVMEO525
Product colorBlack
Product typeEnclosure
Storage
Drive interfaceNVMe U.2
Bay count4
Ports & slots
External connectionNo
Power
Power adapterNo
Power details12 V/2A, 3V3/0.5A
Size & build
Size5.25 in (13.3 cm)
Main materialMetal
Product dimensions163 × 146 × 42 mm
Product weight0.62 Kgs
More details
Cooling fansYes

Questions about this item

What host connectors does the BP-U24NVMEO525 need to run four NVMe U.2 drives?

The backplane uses four Oculink SFF-8611 connectors and two 15-pin power connectors, so your host must provide four Oculink ports and matching power cables.

Can I keep using my 2.5-inch NVMe U.2 drives with this 5.25-inch bay unit?

Yes, the enclosure accepts up to four 2.5-inch NVMe U.2 SSDs or HDDs, each mounted in its own sliding carrier that fits the 5.25-inch bay.

How do I confirm each drive is running at Gen 3 32 Gbps or Gen 4 64 Gbps after installation?

Check the link speed reported by your operating system or RAID controller for each Oculink port; it will show 32 Gbps for Gen 3 or 64 Gbps for Gen 4 depending on the drive and host capability.

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