Dear Community, I tried it all, instructions are rare but I did quite some forum and google search. Nope, would not want to work with my laptop. Guess, I don't have an iGPU and thus no chance. I have a Sony VAIO VPCF13Z1E operating a NVIDIA® GeForce® GT 425M GPU. Tried a PE4C V2.1 (PCIe x16 Adapter) with the DELL AC Adapter => http://www.hwtools.net/<wbr>Adapter/PE4C%20V2.1.html joint with a GeForce® GTX 960 Super JetStream (2048MB GDDR5) http://www.palit.biz/palit/<wbr>vgapro.php?id=2443 Do you see any chances I oversaw? Even tried that DSDT Override as explained in this very thread Actually I though iGPU would only make it better due to Optimus but still w/o switch of dGPU and replace with eGPU for better game performance Any clues or is this a lost case? Thanks guys! Stephan