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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⚡ Unlock next-level speed and portability — because your data deserves the fast lane.

BLAZING 40 GBPS SPEED - Experience lightning-fast data transfers up to 2805MB/s read and 2734MB/s write — no more waiting around.
FUTURE PROOF USB 4 READY - Backward compatible with USB 3.2/3.1/3.0/2.0, ensuring maximum versatility across all your devices.
POCKET SIZED POWERHOUSE - Compact, sleek design fits effortlessly in your bag or pocket — perfect for on-the-go professionals.
JHL 7440 CERTIFIED DUAL CHIP - Industry-grade chip ensures rock-solid stability and superior heat management for nonstop performance.
SEAMLESS CROSS PLATFORM COMPATIBILITY - Works flawlessly with M1/M2 Pro/Max Macs, iPad Pro, Windows, macOS, and Linux — your all-in-one storage solution.

The ACASIS TBU 405 is a cutting-edge M.2 NVMe SSD enclosure delivering up to 40Gbps transfer speeds with certified dual-chip stability and advanced heat dissipation. Compatible with M1/M2 Pro/Max Macs, iPad Pro, Windows, macOS, and Linux, it supports SSD sizes 2280 B+M M-Key and USB4/3.2/3.1/3.0/2.0 interfaces. Its compact, travel-friendly design makes it the ultimate high-performance storage companion for professionals on the move.

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TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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Hard Disk Form Factor	2.5 Inches
Compatible Devices	Laptop
Data Transfer Rate	600 Megabytes Per Second
Maximum Number of Supported Devices	1
Hardware Platform	Windows
Memory Storage Capacity	8 TB
Hardware Interface	USB Type C
Item Weight	0.16 Kilograms
Item Dimensions L x W x H	3.94"L x 2.4"W x 0.57"H

FREEGENEACASIS 40Gbps M.2 NVMe SSD Enclosure, TBU 405 for M1 M2 Pro/Max, Compatible with USB4/3.2/3.1/3.0/2.0, Support SSD Size 2280 B+M M-Key

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