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Head-to-head · Best External SSD Enclosures

ACASIS USB4 40Gbps NVMe Enclosure vs Sabrent Rocket Nano V2

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

ACASIS USB4 40Gbps NVMe Enclosure comes out ahead by a clear margin (4.4 vs 4.0). The gap is mostly about video editors and power users needing fast external NVMe storage — read the strengths below before deciding.

ACASIS USB4 40Gbps NVMe Enclosure
Higher ratedRanked #2 in Best External SSD Enclosures
ACASIS USB4 40Gbps NVMe Enclosure
1 source$75.99as of Aug 1

The ACASIS USB4 40Gbps NVMe enclosure is an aluminium single-drive M.2 case built around an ASMedia ASM2464PD bridge, with an active fan on top of a shell that already works as a heatsink. BestChoices lists it in its Acasis 40Gbps NVMe enclosure comparison. The draw is a 40Gbps path on hosts that support USB4, tool-free installation and temperatures well below what plastic enclosures reach; the costs are an audible fan under load, no encryption and no RAID.

Strengths
  • — Supports Thunderbolt 4/3 and USB4 for up to 40Gbps connection speed with consistent sustained throughput under long transfers
  • — Active cooling fan and thermal pad provide excellent temperature control during high-load operations
  • — Easy tool-free installation with click-fit 2280 NVMe drive insertion and included mounting screws
Watch-outs
  • — Fan is audible under sustained heavy load which may be disruptive in quiet environments
  • — No hardware encryption or RAID options—single-drive use only
  • — Some early firmware polish needed for maximum compatibility with older USB ports
$75.99 · Check Price on AmazonFull review →
Sabrent Rocket Nano V2
Ranked #4 in Best External SSD Enclosures
Sabrent Rocket Nano V2
6 sources$239.99as of Aug 1

Sabrent's Rocket Nano V2 fits USB 3.2 Gen 2x2 support and up to 4TB into a pocketable body, and it performs well for the size. TechRadar found it sustains throughput well while falling short of peak Gen 2x2 speeds at 1,500MB/s. PCWorld praised the small form factor and good performance, noting it trails competitors slightly on raw speed. The drawbacks: no IP ratings, minimal software, and a 3-year warranty that runs short. It fits buyers who care about portability and capacity more than warranties and durability certifications.

Strengths
  • — USB 3.2 Gen 2x2 support with quoted speeds up to 1,500MB/s read/write
  • — 4TB capacity option in a very compact form factor (11.9 x 29.6 x 69.95mm)
  • — No thermal throttling during sustained performance
Watch-outs
  • — Only 3-year warranty compared to 5-year warranties from competitors
  • — No IP rating or durability specifications provided
  • — Zero software included with the device
$239.99 · Check Price on AmazonFull review →

How they stack up

ACASIS USB4 40Gbps NVMe Enclosure

Against the Samsung X5, the ACASIS lets the buyer choose the drive rather than paying for a bundled one, and against the ORICO Thunderbolt 3 enclosure it adds USB4 and Thunderbolt 4 support. The Sabrent Rocket Nano TB4 is more compact with similar thermals but usually costs more, and the ASUS ROG Strix Arion is smaller, cheaper and considerably slower.

Sabrent Rocket Nano V2

The Sabrent Rocket Nano V2 is more compact and offers a 4TB capacity option compared to the larger OWC Express 1M2, but it lacks the 5-year warranty and IP rating of its competitor. While the ASUS ROG Strix Arion provides better thermal management, the Sabrent's lack of thermal throttling during sustained performance makes it a good choice for users prioritizing portability over durability. Unlike the ACASIS USB4 40Gbps NVMe Enclosure, the Sabrent offers a more budget-friendly option with a smaller form factor but without active cooling.

Specs side-by-side

SpecACASIS USB4 40Gbps NVMe EnclosureSabrent Rocket Nano V2
InterfaceUSB4.0 40GbpsUSB 3.2 Gen 2x2
Speed40 Gbps1,500MB/s read/write
SSD SupportThunderbolt 3/4M.2 2230 NVMe PCIe Gen 4
MaterialAluminum alloyAluminum
CoolingActive fan with thermal padPassive
Dimensions100 x 68 x 15 mm11.9 x 29.6 x 69.95mm
Weight0.22 lb0.1 lb
Bridge ChipASMedia ASM2464PDJMS583
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