Intel 950 CPU, stock, 6GB RAM, 6950 GPU Gigabyte X58 motherboard. Playing Skyrim (installed to 1TB WD Black) and loading Calibre files from boot drive to NAS Whilst boot drive is being accessed framerate in Skyrim is pretty bad. Also whenever I do something zip compress a file, again framerate drops. CPU isn't being loaded, pretty sure HD are in AHCI mode, have installed MB drivers. Any ideas?