Head-to-head · Best Portable SSDs

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.

The short answer

ASUS ROG Strix Arion comes out ahead by a narrow margin (3.8 vs 4.1). The gap is mostly about gamers and content creators who prioritize performance and aesthetics — read the strengths below before deciding.

Ranked #6 in Best Portable SSDs

ACASIS USB4 40Gbps NVMe Enclosure

3.8

$79

The ACASIS TBU405 Air delivers strong real-world performance for users needing fast external NVMe storage at a budget-friendly price point. My Tech Grid reviewer Everett Ashford praised its consistent sustained speeds and thermal control during long transfers, calling it a solid pick for video editors and photographers. The unit supports Thunderbolt 4/3 and USB4 with active cooling, making it ideal for power users on M1/M2 MacBooks and Windows laptops. However, Reddit users noted the fan noise under load and lack of encryption/RAID features may be drawbacks for enterprise users. Best for creative professionals who want Thunderbolt speeds without the premium cost, but those needing quiet operation or advanced features should consider alternatives.

Strengths

— Supports Thunderbolt 4/3 and USB4 with up to 40Gbps transfer speeds
— Active cooling system with fan and thermal pad ensures sustained performance under heavy load
— Tool-free installation for M.2 NVMe drives with support for 2280, 2260, 2242, and 2230 sizes

Watch-outs

— Fan is audible during sustained heavy use
— No hardware encryption or RAID capabilities
— Some early firmware polish needed for maximum compatibility with older USB ports

$79 · Check Price on Amazon Full review →

Higher ratedRanked #4 in Best Portable SSDs

ASUS ROG Strix Arion

4.1

$59

The ASUS ROG Strix Arion delivers solid performance as a 10 Gbps M.2 NVMe enclosure with a premium aluminum build and effective cooling. TechPowerUp praised its rigid construction and heat dissipation, while Reviews Inside noted the RGB lighting adds visual appeal for ROG enthusiasts. However, GPCB criticized the pin-based installation system as impractical for frequent SSD swaps. The enclosure's higher price point compared to similar alternatives like the Samsung T7 Touch makes it less value-driven for budget-conscious users. This product appeals to gamers and content creators who prioritize performance and aesthetics over portability and cost.

Strengths

— Rigid aluminum construction with excellent thermal management via pre-attached 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

— Pin-based lid mechanism is not tool-free and prone to getting lost
— More expensive than comparable 10 Gbps enclosures with similar performance
— Bulkier form factor reduces portability compared to some competitors

$59 · Check Price on Amazon Full review →

How they stack up

ACASIS USB4 40Gbps NVMe Enclosure

The ACASIS USB4 40Gbps NVMe Enclosure outperforms the ASUS ROG Strix Arion in terms of Thunderbolt 4/3 support and active cooling, making it ideal for creative professionals. However, it's less aesthetically pleasing than the OWC Express 1M2 and lacks hardware encryption, which the OWC offers. Compared to the Plugable USBC-NVME, it provides better performance and compatibility but at the cost of fan noise and a more complex installation process.

ASUS ROG Strix Arion

Unlike the ORICO M2VG01-C3 and Plugable USBC-NVME, the ASUS ROG Strix Arion offers a more premium build with pre-attached thermal pads and RGB lighting, making it stand out for enthusiasts who value aesthetics and cooling. However, it's bulkier and more expensive than the ACASIS USB4 40Gbps NVMe Enclosure, which provides better value for power users seeking Thunderbolt speeds without the premium cost. Compared to the OWC Express 1M2, it lacks the universal compatibility and unpopulated design that makes the OWC a more flexible option for those wanting to use their own SSDs.

Specs side-by-side

Spec	ACASIS USB4 40Gbps NVMe Enclosure	ASUS ROG Strix Arion
Interface	Thunderbolt 4/3, USB4	USB 3.2 Gen 2 (10 Gbps)
Speed	Up to 40Gbps	Up to 7200 RPM
Capacity	Up to 4TB	2.5-inch HDD/SSD
Form Factor	2280, 2260, 2242, 2230	2230, 2242, 2260, 2280
Dimensions	100 x 68 x 15 mm	147 x 101.6 x 26.9 mm
Weight	110 g	0.45 kg
Compatibility	M1/M2 MacBooks, Windows laptops	M-Key & B-Key PCIe/NVMe
Material	Aluminum Alloy	Aluminum

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