Hmmm ini tak bagus...... could possibly be the cable problem? I'm using the Cable that came with the SSD drive; maybe that's not a TB4 cable so that's why?

A note for Macworld readers: Somewhat confusingly, Macs support 20Gbps USB, but only if the SSD is USB4. USB 3.2×2 20Gbps SSDs such as the SL600 will perform at 10Gbps using the USB 3.1 gen 2 protocol on Apple computers.

https://www.pcworld.com/article/2239717/lex...e%2520computers.

I have almost all the enclosures for NVME from Ugreen, Baseus, Acasis, ShouLe, Fideco, Jeyi and more. So far, only the Jeyi ones has trouble with certain NVME SSDs. The rest all good and stable.

ShouLe ones quite nice. Cheap and has health status LCD but not backlit. Can order from Lazada directly. Much cheaper than AliExpress.

Ah, so this SL600, although it says can support up to 20Gbps, it won't because I don't have the hardware that can support it is it? Sorry ah, tech n00bie here


"A note for Macworld readers: Somewhat confusingly, Macs support 20Gbps USB, but only if the SSD is USB4. USB 3.2×2 20Gbps SSDs such as the SL600 will perform at 10Gbps using the USB 3.1 gen 2 protocol on Apple computers."

But here's the thing, the new M4 Mac mini ports are USB4 isn't it so it should be giving me the max speeds, no?

This post has been edited by tinkerbel: Dec 2 2024, 09:44 PM

Mac does not support USB 3.2 Gen 2x2 protocol which I just learn couple days ago. That's why my 20gbps portable ssd never reach 2000MB/s. Mac only support TB3,4 USB4 and USB 3.2 Gen 2 10gbps.

I thought the 2 front ports on the M4 Mac Mini is USB 3.2 Gen 2x2 protocol.... which reminds me, I should test the speed again using the front ports but OMGAWD I just sorted all the cables!

The front port is only 10gbps.

And the back port?

TB4 40gbps which USB4 can utilize as well.

As a follow up to the SL 600, it's giving me the same speeds of about 900+ on the front ports - I'm not getting the 2000mbps speeds as I expected it to be but ah well...... should be suffice for my needs for now.

its because macs' tb4 ports dont support usb 3.2 2x2 speeds of 20 Gbps. in fact very few pcs do. it came pretty late into the usb lifecycle and manufacturers already started adopting USB4 instead. you can only get 10 Gbps with usb 3.2 gen 2

You can see here the example as given by kingston for their XS2000 external ssd which supports usb 3.2 2x2



only way to get over 10 Gbps r/w speed is by using a gen 4 nvme ssd in a USB4/tb3/tb4 enclosure

Thank You! I've now learnt something

u need enclosure with Thunderbolt 4/USB4 for Macs, else u will only getting 10gbps which i think is plenty enough.

20gbps USB 3.2 Gen 2x2 only supports Windows PC.