I recently bought two GTX 970m's to replace the 7970m CFX setup in my p-377sm-a. I got the first card in the mail and installed it without any problems. It was essentially plug and play. The only problem was the throttling due to the TDP limit imposed by the vbios. I decided to flash Prema's custom GTX 970m vbios which is supposed to take care of that issue. I flashed the card, restarted my computer, and all I get is a black screen. The computer boots into windows fine, but the internal displa