Asmedia ASM2464 NVME/USB 4.x Controller Firmware Version 250528_85_00_00

Ok tested a bunch more usb 4/thunderbolt cables with my asm 2464 or Colorii MC40-Silver- USB 4 enclosure.

No cables above 30cm work stable, they may work most of the time or not at all or randomly cut out. I had to run crystaldisk benchmark a few times to double check.

So the easiest solution, stick with 30cm or less size cables. I managed to find a 35cm cable (SMALLRIG USB4 40Gbps USB-C Cable, 240W Fast Charging & 8K@60Hz Video & 40Gbps Data Transfer, 35cm/13.8in Straight to Angled Connectors with Cable Tie, for MacBook for iPad Pro for iPhone - 5075) its available from amazon and aliexpress just run a search. Or click here
Its the only one I found with a right angle so it makes it easier for computers on the back port and its 5cm bit more longer so gives me just about enough clearance to attach flash drives and usb 4 enclosures to do my back ups.

I would not use 40cm or longer cables, must have tried 20 of them and returned 20 of them back to amazon.


 

Yes, I can confirm that the longer it is, the more unstable it is.