Head-to-head · Best External SSD Enclosures

ACASIS USB4 40Gbps NVMe Enclosure vs ASUS ROG Strix Arion

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 3.8). The gap is mostly about video editors and power users needing fast external NVMe storage — read the strengths below before deciding.

Higher ratedRanked #2 in Best External SSD Enclosures

ACASIS USB4 40Gbps NVMe Enclosure

4.4

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 Amazon Full review →

Ranked #6 in Best External SSD Enclosures

ASUS ROG Strix Arion

3.8

3 sourcesall derived$54.99as of Aug 1

As a PCIe 3.0 x2 NVMe SSD enclosure with a 10 Gbps USB 3.2 Gen 2 interface, the ASUS ROG Strix Arion gets close to the ceiling, transferring at just over 1000 MB/s. TechPowerUp praised the rigid aluminum build and effective heat dissipation, while Reviews Inside noted the RGB lighting adds flair that won't appeal to everyone. Its tool-free design uses a SIM-pin mechanism that works but frustrates frequent SSD swaps. It costs more than competing options, so the premium materials and performance point it at gamers and content creators who value aesthetics and reliability over portability and cost savings.

Strengths

— Rigid aluminum construction with excellent thermal management via pre-installed thermal pads
— Supports PCIe 3.0 x2 NVMe SSDs at maximum 10 Gbps transfer speeds
— Includes both USB-A and USB-C cables for versatile connectivity

Watch-outs

— Requires a SIM-tray pin for access, which can be lost and is less convenient for frequent SSD swaps
— Priced higher than similar 10 Gbps enclosures with comparable performance
— Bulkier form factor reduces portability compared to some competitors

$54.99 · Check Price on Amazon Full review →

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

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.

ASUS ROG Strix Arion

Unlike the ORICO M2VG01-C3, which uses a snap-together design that can disassemble easily, the ASUS ROG Strix Arion offers a more robust aluminum build with pre-installed thermal pads for better heat dissipation. While the Sabrent Rocket Nano V2 provides a compact form factor, the Arion's premium materials and RGB lighting make it stand out for gamers and content creators who value aesthetics and reliability over portability. Compared to the ACASIS USB4 40Gbps NVMe Enclosure, the Arion lacks active cooling but compensates with its rigid construction and tool-free design, though it's priced higher and less portable.

Specs side-by-side

Spec	ACASIS USB4 40Gbps NVMe Enclosure	ASUS ROG Strix Arion
Interface	USB4.0 40Gbps	USB 3.2 Gen 2 (10 Gbps)
Speed	40 Gbps	—
SSD Support	Thunderbolt 3/4	M-Key & B-Key (PCIe/NVMe)
Material	Aluminum alloy	Aluminum
Cooling	Active fan with thermal pad	Dual 120mm fans
Dimensions	100 x 68 x 15 mm	280 x 190 x 35 mm
Weight	0.22 lb	3.09 lb
Bridge Chip	ASMedia ASM2464PD	ASMedia ASM2362

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