Hi @ all, after reading a lot as a guest, I decided to register to this forum and explain my experience. @Petrroll: I also bought an EXP GDC V6.0 and nothing worked for me! I also own a Lenovo Thinkpad T540p and had Problems with the detection of my eGPU. My first adapter didn't work at all, so I talked to herocloud and got a second EXP GDC (this time V7.0)! At first I had again problems and no eGPU was found! I tried both EC-cables and also pushed the cable and connector into different directions. Nothing happened! I also tried different power supplies (220W Dell and 500W ATX PSU). Same problem! I was wondering about the automatic power switch off after disconnecting the cable. So I shortet the Pins 13 & 14 (PS_ON signal) of the 24pin ATX connector and the eGPU was powered all the time with the ATX PSU! Now my eGPU (AMD R9 280X) was found, but in Windows I had again problems with the connection. I could install the driver but the connection got lost ==> blue screen. I didn't receive any stable connection to my eGPU. I also thougth like you maybe my EC-slot is defect. I also tried an old nvidia 9800 GT with the same bad connection. I think the adapters or cables are defect and cannot hold the connection alive. I was really sad. After talking again to herocloud, he refunded the money for the adapter. This time I bought the PE4C V2.1 and everything is working fine! I've got a stable x1.2 connection! But again I have problems with the automatic powering of the adapter! With the auto power function activated, I didn't get a connection to my eGPU! After shorting again the 2 pins of the 24pin ATX connector the eGPU was found and everthing worked fine! Maybe this is a problem of the Lenovo T/Lx40 series? Could you please check this for you? I hope this will help you.