I bought a 64GB Sandisk Extreme USB 3.0 Flash Drive, and if it’s plugged in to the USB 3.0 ports controlled by the chipset (AMD A75), the pendrive don’t work correctly, but it’s too slow, like USB 2.0 pendrive.
I tested the drive on USB 3.0 ports on my desktop and this is the results:
Don’t work (too slow) if plugged here: AMD A75 FCH (Hudson D3) chipset : 4 x USB 3.0 port(s) (2 at back panel, blue, 2 at mid-board)
Work fine if plugged here ASMedia® USB 3.0 controller : 2 x USB 3.0 port(s) (2 at back panel, blue)
Work fine if plugged here SilverStone EC01-P (an expansion card controlled by NEC uPD720202, PCI Express 2.0 with single lane(x1) throughput 5Gbit/s)
All the driver / firmware / bios are updated.
I tested the pendrive with CrystalDiskMark.
Motherboard model: Asus F1A75M-Pro.
Windows 7 64bit
Asus support says : " … the pendrive it’s incompatible with chipset …"
Thank you very much.