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The PA40SU is a handsome, mostly metal black rectangle measuring approximately 4.75 inches long, by 1.8 inches wide, by 0.6 inches thick. Weight is around 4.7 ounces with an SSD inside. It’s svelte indeed for a 40Gbps SSD enclosure — witness the large fins and bulk of the competing OWC 1M2 and TerraMaster D1 Plus. The enclosure is slotted on both sides to facilitate air flow, and is actively cooled by a fan at the non-port end. The fan is the reason it’s not as bulky as the aforementioned competition. The NVMe bridge/controller chip is an ASMedia ASM2464PD, and no AC adapter is required — the

The PA40SU was retailing on Amazon for $120 at the time of this writing. That’s roughly the going rate for a 40Gbps enclosure at the moment, though some that have been around longer might offer better discounts. Alas, the one-year warranty is a bit disappointing. I was expecting at least two years at this price point.

I like the looks, I like the performance, and I like how easy it is to install an NVMe SSD in the PA40SU. I’d prefer that it run a bit cooler, but it’s still a worthy product. Go for it, but as always — shop carefully to get the best bang for your buck.

AI infrastructure is the integrated foundation that enables AI to operate. It combines specialized hardware, software platforms, storage, networking, and management layers to support the full AI lifecycle—from data preparation and model training to inference, monitoring, and continuous improvement. Unlike traditional IT, which is designed primarily to run business applications and store data, AI infrastructure is built for high-throughput computation, fast data movement, and sustained model-driven workloads.For further reading: See also: Your Data Center and Enterprise Solution Provider | ASUS