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Silver aluminium four-bay NVMe enclosure with cooling fan

Acasis

Acasis EC-3901 4-bay NVMe drive enclosure 40Gbps Thunderbolt

SKU CH-B3NG-Q003F MPN EC-3901

Four-bay NVMe enclosure with 40 Gbps Thunderbolt speed, software RAID modes, and a cooling fan keeping drives at 40 °C (104 °F)

  • External connection1:1
  • Bay count4 Bay
  • Product colorSilver
  • Main materialAluminum
  • Up to 27Gbps single-drive read speed for instant file access
  • Up to 16Gbps per drive with four SSDs for parallel throughput
  • Turbo cooling fan keeps drives as low as 40°C (104°F) under load
  • Tool-free magnetic bays let you swap four 8TB NVMe SSDs in seconds
  • Daisy-chain Thunderbolt ports expand workstations without extra docks

4-bay NVMe enclosure with 40 Gbps Thunderbolt

The Acasis EC-3901 is a four-bay NVMe enclosure that connects through a single Thunderbolt 5, Thunderbolt 4, Thunderbolt 3 or USB4 port. It accepts four M.2 NVMe drives up to 8 TB each and reaches a total of 32 TB in Larger mode. An all-aluminium chassis and a built-in turbo fan keep drive temperatures low during sustained workloads.

Creative professionals needing massive NVMe RAID

Editors, designers and developers who want software RAID 0, 1, 5 or 10 across four NVMe drives will benefit from the 40 Gbps link and per-drive speeds up to 16 Gbps. Users whose host only offers USB 3.x or USB 3.2 cannot reach the rated bandwidth. Builders who need fewer than four bays or a portable single-drive dock should choose a smaller unit.

40 Gbps Thunderbolt host interface required

The enclosure only works with Thunderbolt 5, Thunderbolt 4, Thunderbolt 3 or USB4 ports; a USB 3.x or USB 3.2 connection will not function. Verify that your Mac, Windows PC, Chrome OS device or iPad provides one of these interfaces before purchase.

How it compares

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

Price $238.99
Pricier than about 90% of the 821 comparable items (median $30.99).

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Specifications

Product
Product colorSilver
Storage
Supported drivesNo
Bay count4 Bay
Ports & slots
External connection1:1
Size & build
Main materialAluminum

Questions about this item

How loud is the built-in turbo cooling fan when the Acasis EC-3901 runs continuously and keeps four SSDs at 40 °C (104 °F)?

The all-aluminum body and built-in turbo cooling fan maintain SSD temperatures as low as 40 °C (104 °F) during sustained operation, providing active thermal management for all four bays.

Which host port must my computer already have for the Acasis EC-3901 to function?

The enclosure only works with Thunderbolt 5, Thunderbolt 4, Thunderbolt 3 or USB4 ports; it will not operate on standard USB-C or USB 3.x connections.

Can I daisy-chain the Acasis EC-3901 with an older Thunderbolt 3 RAID array on the same bus?

Yes, the EC-3901 supports daisy-chaining, so it can sit downstream of or upstream from legacy Thunderbolt 3 devices while sharing the 40 Gbps bandwidth.

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