Hello! GPU-Z shows, that my video card is running at PCI-E x1, thou it is put in x16 slot. I know that cards go into lower mode for power saving, but during gpu-z render test it dont change!
GTX 460 768mb
Core I5-4440 3,1 Ghz
8 GB RAM
GPU-Z screenshot: http://imgur.com/wNxuMmp
I think that may cause troubles described in that topic http://www.bleepingcomputer.com/forums/t/552351/awful-pc-performance/#entry3508952