Problem description 1. eGPU is not detected, 2. We followed the Troubleshooting FAQ to resolve the problem, it doesnt help. Platform Description 1. Win 7 pro 64 2. lenovo x220 3. 8Gb (2*4) 4. EXP GDC Ares+ GTX 660 ( also gtx 650ti) 5. Cooler Master RS 400 - pc PCAP -A3 ( also DPS 800 LBA) Nearly several months ago it worked well, then we didnt use eGPU. When tried to start it again - eGPU was not detected. eGPU+ gtx 660 windows booted very slow but BIOS started. With gtx 650ti - OS booted fast, but eGPU was not detected at all. Videocards and PSUs worked well from the PC.