Hi, I received the VTX3D HD 7750 GPU today and I can't get it to work at all. It does not show up in the drivers, does not install instantly (Like my 5450 does) there is just no sign of it. My set up is; Win 7 64 bit AMD FX-4100 CPU asus m5a78l-m lx Mobo 500w PSU (Prob generic but shouldn't be the problem) 4GB RAM I e-mailed the company that I purchased my PC from before I ordered the card to double check that it would be compatible and they said it would work no problem. I'm pretty sure they'd have no reason to lie. The steps I took to install the new card were; Uninstall HD 5450 (Ticked remove driver box too) Uninstalled catalyst control Switched off PC Slotted 7750 in nice and tight Powered on PC (Was no signal from either port on 7750 so had to connect to the onboard VGA) Installed 7750 catalyst control from AMD website I have tried this and variations of this about 10 times and I'm totally stumped. I have put my 5450 back in and it works fine, windows picks it up on start up and 5450 catalyst control works fine. I'm thinking the card was DOA? Any ideas? Thanks.