Ok guys here my problem. i got a Radeon HD 5770 1gb GDDR5 PCI-E card. i put it in my computer and computer is not booting up. Now it does have power when when i turn computer on but i get no system beeps telling my anything is wrong, it just sits there. so i was like great DOA on card. Well i put my old card back in, computer boots up perfect, so no issues with computer. i took card to a friends house, and put the card into his computer, boots up perfect for him- no issues. so i iknow the card is fine. i dont know why its not working in my computer. Heres my Specs. Now to just state the oblivious i have check all the cords, nothing touching, everything is plugged in, the 6 pin PCI-E power is plugged in, the video card fan boots up fine, i can see that. i do here a small clicking noise from the 6 pin plug in area on the V0card it self- so i tried the 6pin that came with the card not the one my power supply had, still does the same thing. quiet click happens once sometimes twice. i have a 650 watt power supply, thats plenty of power, the specs on card says 400w tops so, little confused. I remove the card, i get the long beep and 2 short beeps from computer stating that no video card is found blah blah blah you all know. so thats why i am wondering what the heck is wrong. this is a custom built computer. k heres the specs. AMD Athlon 64 X2 4600+ Windsor 2.4GHz Socket AM2 89W Dual-Core Processor Model ADA4600CUBOX GIGABYTE GA-M55SLI-S4 AM2 NVIDIA nForce4 SLI ATX AMD Motherboard Western Digital Caviar SE16 WD2500KS 250GB 7200 RPM SATA 3.0Gb/s 3.5" Hard Drive CORSAIR XMS2 1GB (2 x 512MB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model TWIN2X1024-6400C4 - Retail CORSAIR XMS2 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model TWIN2X2048-6400 Microsoft Windows XP Home With SP2 32-bit Power supply is a 650W Antec Any suggestions?