Windows 7: need help with installing xfx radeon hd 6770 with amd fx 4100

I bought the xfx radeon hd 6770 graphic card, plugged in, connected the 6 pin molex cable, and when i turn it on, the fan, light, works fine, but nothing appears on the screen.... i changed the bios setting and disabled the integrated graphic card and still can't get it to work

heres my pc

AMD FX 4100 BULLDOZER QUAD CORE 3.6GHZ
8GB DDR3
ATI HD3000 GRAPHICS
750GB SATA HARD DRIVE 72000RPM
500WATTS POWER SUPPLY
Windows 7 Ultimate 64bit
GIGABYTE AM3+ MOTHERBOARD

At the risk of offering insult by asking the obvious,

Is the monitor connected to the 6770? If yes, do you see anything during POST (power on self test)?

Is the 6770 fully seated in the PCI-E X16 slot?

the graphic card is properly seated and connected to the monitor. i'm not sure what POSt is

post is when you turn it on and do you get any beep codes when you turn it on?If so how many and are they long or short beeps

no, nothing, no sound, no picture, nothing

There may be no beep codes without a case speaker attached to the pins on the front panel block.

If Omega09 is seeing and hearing nothing, that makes things hard to diagnose. The obvious things would be to try a different graphics card, or to try the 6770 in a different system. Not helpful suggestions if neither are available.

i returned the 6770 and got a geforce gtx 5550 ti and everything works fine now.

Glad you let us know,faulty cards will do that to you.Have fun with your great new video card.

Yea, but now theres another problem. the pc shuts off on its own while i play games. I did some research and most people said it might be overheating or a power issue. But its has 500 watts, i only have 1 hard drive and 1 CD driver, nothing else on the computer. Is it overheating? what can i do? All the fans seem to working fine.

Down load a gpu tweaking program like Evga precicion and monitor your temps