ACASIS80Gbps M.2 NVMe SSD Enclosure, with Cooling Fan, Compatible with USB4 V2.0, USB4 V1.0, USB3.2/3.1/3.0 (TB501 Pro) (Phantom Gray)

I use this with a WD Black 8TB NVMe card. It works great with almost no speed difference as a Data drive for my Mac Studio. It is worth the price but would like to start seeing lower prices on Thunderbolt 5 devices.

I have been waiting for Thunderbolt 5 eGPU enclosures to hit the market for a long time but as of August 2025, there is still almost none. I purchased Razer Core X V2 but it had TB5 connection issue with my Asus ROG Strix Scar 18 (2025). I thought M.2 enclosures could connect to oculink adapter and become used for an eGPU setup but I could not find any reviews on the internet. I ended up trying this myself.Compared to Trebleet and other enclosures, this product seem to have very good PCIe M.2 signal strength. I am using this to connect to my RTX 5090 FE gaphics card using https://a.co/d/c2vm0Zd adapter and Aoostar AG02's oculink port. In nvidia-smi PCIe error counter, I get zero issues even when using long oculink cable to Aoostar AG02.This setup is super stable because I run games for hours and test with nvidia-smi and still get zero error counters.

I am writing this review to warn potential buyers about the TB501Pro and the absolutely atrocious customer service from this seller. I contacted them over a week ago (via their online chat and "Contact Us" page) regarding a major issue with the product, and I still haven't received a response. Their chat box boasts an 8-hour reply time, which is a complete and utter lie.The TB501Pro itself is a complete waste of money. I tested it extensively with multiple devices (Mac Studio, MacBook Pro, and iMac) and three different NVMe SSDs (WD Black 850X, Sabrent, and Samsung 970 EVO Plus). Regardless of the combination, the SSDs would constantly disconnect, making the device completely unusable.To make matters worse, the thermals are terrible. The device gets excessively hot, and it has actually fried one of my SSDs. This is not just a minor inconvenience; it poses a serious risk to your hardware.Not only is the product defective, but the seller's complete lack of response is unacceptable. It's been over a week, and they haven't even acknowledged my message. This shows a complete disregard for their customers and a lack of willingness to stand behind their products.Save yourself the headache and avoid this product and this seller at all costs. There are plenty of other reliable options available with companies that actually care about their customers. I strongly advise you to think twice, you've been warned!

So Im using this on a Mac Studio M3 Ultra, the base one with 28/60 cpu/gpu cores and thunderbolt 5 120Gbps. The internal 1TB drive hits around 6000-6500 MB/s in real world use and it was an extra $400 for only 1TB more. So I bought this and a 4TB Samsung 990 Evo Plus ($250). With this I get around the same speeds, a tiny bit less, than the internal NVMe for a little over $500 for 4TB instead of +1TB for $400.Haven't noticed any issues with it getting too hot or being noisy. Just make sure to put the thermal pad on it that comes with this and it was easy to install the NVMe since it doesn't require any tools. Highly recommend but I wish someone made an enclosure with the full 120Gbps speed instead of just 80Gbps but it basically maxes out PCIE 4 x4 NVMes so that works for me.

6000 MB/S This rocks with a Samsung 990 pro 4TB. It seems hot but after putting an infrared thermal camera on it, it’s running well within the proper heat specs for the drive. It utilizes USB 4 V.2 to achieve Thunderbolt 5 speeds but it is not actually TB5. Running it with a Mac Studio M4 Max. So far so good. Expensive but bleeding edge until pci v5 enclosures become available if ever.

This is my third purchase of an Acasis Thunderbolt product.Some background: I’ve been using their products for years. Pretty reliable. The first purchase was a Thunderbolt 3 M.2 enclosure. The second purchase two Thunderbolt 4 Dual M.2 enclosures. I used both Dual M.2 enclosures to create a RAID 0 array. The built in fan on these Dual M.2 enclosures have an annoying pitch so I bought a separate 8” fan to blow directly on it. I achieved stable speeds around 5000 MB/s.The Thunderbolt 5 Enclosure:I bought four of these to replace my aforementioned dual M.2 enclosures. This for me is a temporary fix until they come out better enclosures. That said my use case is niche and regular users will be satisfied with this. The built in fan is VERY quiet, I can’t hear it. I have to literally put my ear up to it. That’s great. There is a button to turn this fan on and off - that’s cool (no pun intended). But I’ve noticed the fan will turn off on its own sometimes after extended use and there’s no light to indicate if the fan is on or off (although it's only turned off on it's own once, might be a fluke). They did such a good job with the fan that I feel like a light indicator would help. Initial speeds for my RAID 0 are phenomenal, but for some reason it always trickles down aggressively. For my RAID 0, my initial write speed was 17,000 MB/s and read was 14,000 MB/s. After a few hours, it’s greatly reduced. Write stabilized between 6500 and 7500 MB/s and read between 12,500 to 14,000 MB/s. It’s still REALLY fast, but I can’t seem to keep the initial speeds. I am guessing this is because it doesn’t have its own dedicated power source like the dual M.2 enclosures. Without the RAID, just as individual enclosures you’re looking at about 5,000 to 5500 MB/s. I have not tested an individual enclosure after hours of use, but the RAID I set up is not ever turned off and it holds up fine. I would argue that a RAID is an adequate stress test to determine if the product is good for most users. Given that it’s been holding up for days at this point, I can safely recommend it.My set up is a Mac Studio M3 Ultra (32C/80C) 512GB Memory and 4TB storage.