Can you use less than 4 ports on these? I mean lets say you just have 2-3 GPUs and want to use this PCIe raiser?
Yes I currently have one in my gaming PC. I use it to test OC's on new (for me) algorithms for stability without the risk of a whole rig going down unattended. It has run 1, 2, 3 and 4 gpu's just fine. I have been told in forums it works fine with the Linux mining OS's as long as your mobo bios is up to date and supports it.