So I just bought an new Asus GT630 (I know its not fast, but i dont game that much), to replace my GT520. They both dont have 6pin power connectors. the GT520 works fine, but whem i put in the GT630, the pc turns on, but it doesnt show anything, it even doesnt turn on the screen. Its not the power supply, i have already checked that. Next week i will try another motherboard to test if its the card. Anybody any suggestions? a bios setting or something? This are my specs: Antec 450 watt Asus P5G41C-M LX Intel Q6600 OC @ 3.0 GHz Asus GT630 2GB 8 GB kingston valueram 64 GB SSD and a hard disk for storage.