Is this the newest model or is there a newer model out?

who can tell what's truthful, with all this bogus 40Gbps USB4 marketing documentation. the ACASIS site presently states this TBU405 contains "Intel® JHL7440 Thunderbolt™3 with REALTEK® RTL9210B" that USB interface chip RTL9210B is USB 3.1 • 10Gbps. but the Q&A here states it's a different chip JMS583 with that same lowly USB 3.1 • 10Gbps. the ACASIS tool-less model TBU401 is now shipping with TBU401e on the box. "e". but that Amazon sales page and the ACASIS online marketing page don't mention anything about that "e" model update. it's also documented to contain a RTL9210B chip. but a video shows it formerly contained a JMS583. https://www.amazon.com/ask/questions/Tx220PG5HNIY0I3 so. what you see here might NOT be what you get. .

Looking for those who have tried a wd sn850x gen4 in this tbu-405 enclosure. all work well? any performance drop / fails? does it handle gen4 well?

based on below details • there is adequate power supplied by TB. • but insufficient power from native USB. google online image of this WD SN850X sticker shows 3.3V x 2.8A = 9.24 watts. M.2 specification 1.0 states its max power limit is 8.25 watts. that's a little puzzling isn't it? this enclosure's Intel JHL7440 Thunderbolt3 chip datasheet average TDP power is stated to be 2.4W exactly how much more power this enclosure requires isn't disclosed. 9.24 + 2.4 = 11.64 watts native USB4 per published specification can supply only 7.5W (for x2 lane, only 4.5W for USB x1 lane) Thunderbolt3/4 specs are not publicly available, but unqualified online claims say 15W ------------------------------------ regarding speed of this Gen4 7300 MB/s SSD it can get only approx 2750 MB/s in this Gen3 enclosure. if you're happy with that substandard performance from Gen4, very good but it's not even Gen3 top speed.

What is the difference between acasis tbu401 & tbu405?

according to the Seller in that ad, the two models have the exact same chipset. so the functional difference would seemingly be only that the 401 is tool-less. https://www.amazon.com/ask/questions/Tx220PG5HNIY0I3

Compatible with Samsung 980 or 990 Pro?

Yes, I have the 1TB Samsung 980 Pro running in my Acasis case with no problems on either MacBook Pro or Mac Mini Pro.

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Description

⚡ Unlock lightning-fast storage on the go — because speed waits for no one!

COMPACT POWERHOUSE - Travel-ready pocket size that fits effortlessly into your busy lifestyle.
BLAZING 40 GBPS SPEED - Experience near-instant data transfers with cutting-edge NVMe performance.
INTEL CERTIFIED STABILITY - Dual JHL7440 chips ensure rock-solid reliability and compatibility with Thunderbolt 3/4 and USB standards.
SEAMLESS CROSS PLATFORM USE - Plug and play with Mac M1 Pro/Max, iPad Pro, Windows, and Linux devices.
PRO GRADE THERMAL MANAGEMENT - Stay cool under pressure thanks to the integrated fan and aluminum shell design.

The ACASIS TBU 405 PRO is a sleek, aluminum M.2 NVMe SSD enclosure delivering up to 40Gbps transfer speeds. Featuring an integrated cooling fan and Intel-certified dual-chip control, it ensures stable, high-performance operation across Mac M1 Pro/Max, iPad Pro, Windows, and Linux platforms. Its compact, travel-friendly design makes it the ultimate portable storage solution for professionals demanding speed, reliability, and universal compatibility.

Specifications

Material	Aluminium
Item Weight	0.16 Kilograms
Memory Storage Capacity	8 TB
Compatible Devices	Laptop
Hard Disk Form Factor	2.5 Inches
Max Number of Supported Devices	1
Data Transfer Rate	600 Megabytes Per Second
Manufacturer	FREEGENE
Model	TBU405
Model Name	970 EVO Plus
Product Dimensions	10.06 x 4.88 x 1.52 cm; 159 g
Item model number	TBU405
Flash Memory Installed Size	1 TB
Digital storage capacity	1024 GB
Hard Drive Size	1 TB
Hard Drive Interface	NVMe
Hard Disk Description	solid state
Special Features	Compact
Mounting Hardware	thunderbolt cable
Number of items	1
Batteries Included	No
Batteries Required	No
Connector Type	Thunderbolt, USB
Form Factor	M.2
Does it contain liquid?	No
Country of Origin	USA
Item Weight	159 g

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