I have a SanDisk Extreme Pro 55AF (2nd gen) which supports USB Gen3.2 2x2, which caps at about 20 GBps
.
I found that no matter what cable I use (including the included one), I only get 38 MBps
in windows. My M1 MacBook air gets reasonable speeds.
First I thought it was because I went exFAT (for MAC + Windows use), and now even in NFTS I cannot get it past 38 MBps
.
Here are my specs:
- AMD Ryzen 5 5600X
- Windows 11 Home
- MSI XPG X570 Gaming Plus (its site: https://www.msi.com/Motherboard/MPG-X570-GAMING-PLUS ) (the manual: https://download.msi.com/archive/mnu_exe/mb/MPGX570GAMINGPLUS.pdf ) BIOS is updated to the latest as of 4/28/23
- 4x 8GB sticks of some XPG problemaic pro pluses that I will never buy again (crashes unless I use the base clock os 2444, even though up to 5400 was advertised) -EVGA FTW3 Ultra 3090
- Gigabyte something something Wifi 6E PCIE card
Here are the 3 drives I tested:
C
Drive, CT500P2SSD8 500GBD
Drive, SanDisk Ultra 3D NVMe 1TB (Model: SDSSDH3N-1T00)- External SanDisk Extreme Pro 55AF (Gen2, 3.2 2x2) 1TB (Model: SDSSDE81-1T00)
My Motherboard has these USB ports on the back
- 2x USB-A 2.0
- 2x USB-A 3.2 Gen1
- 1x USB-A 3.2 Gen2
- 1x USB-C 3.2 Gen2
- 2x USB-A 3.2 Gen1
My C and D drive seem to be functioning at the speeds they were intended to, but my USB's never perform like they should.
I have attached ATTO screenshots, and have also tried Crystal Disk Mark.
I only have screenshots of the SanDisk external being tested on the USB-C 3.2 gen 2, but no matter which port use, 3.2 gen 1 or 2, or the USB-C 3.2gen2 pictured, I still cap out at 36-42 MBps.
I also attached a screenshot from USB device tree to show that, all the ports support SuperSpeed and are showing up as AMD USB 3.10 (H means slow, S means fast) but none of them are actuall registering or reading as SuperSpeed and are rather showing as standard.
I checked the BIOS, its up to date, and I didn't see any specific settings to enable 3.2 speeds. I did also try changing the xHCI in bios from enabled to disabled and it made no difference.