Interesting link Plumble! Didn't know about that. Must be a driver issue though, since i'm using nVidia 750a SLI with 2.0TB drives as well, but not under Windows. Note that you may not need to install the nVidia IDE/AHCI driver, and may just use the Microsoft driver instead. Should you ever get an SSD this also enables TRIM support, where the nVidia driver does not support this.