udihow

Hi. I've got a Dell M4700, EXP GDC (mPCIe) and an nVidia GTX 770. This combo has been working perfectly without any modifications. Recently I decided to replace the CPU (runs too hot, over 75°C at load). So, I swapped out the 3720QM with a 3940XM. Then, problems arose... Now, none of my discrete GPUs are detected anymore. Only the iGPU (intel). K2100M and GTX 770 are nowhere to be found. I got the setup 1.30 earlier even though I didn't need it then. If I start it now, in menu mode, I get a grey box telling me the eGPU isn't detected. Tried to change a few settings but nothing happens (no idea what I'm doing). If i put the 3720QM back, the GPUs comes back and works just fine again. Is there any logical explanation for this behavior?