I've Asus M4N68T-M motherboard. 500 GB Sata II HDD and 2 GB DDR3 Rams. I bought EAH4670 1GB DDR3 Graphic Card (PCI-E) today and put it on the board. But it didn't work. My O/B GPU was still working. When I put the cable to EAH4670 the pc working but no screen. Just black screen.
In the bios>Adventage it shows Primary PCI-E>PCI>IGP
VGA Chipset ATI
VGA Chipset Model HD4670
VGA Slot PCI Express 2.0
Memory (RAM) Capasity 1 GB
Memory Speed 1600Mhz
Core Speed 750Mhz
Screen Connection DVI / Analog / HDMI
It's weird because if I plug it, pc starts so slow. I mean about 15-20 seconds later after I push the power button. Pc starts but no screen. Just black screen. I change the screen adaptor to HD4670 to O/B while pc running and it shows me the windows screen. I'm not sure that the Hd4670(which I bought) works correctly.
But well, I thought to give it back. Today I will do it. Will buy an other graphic card about same prices.