|"i have recently bought a new graphics card, ATI RADEON sapphire HD 2600pro"|
I'm guessing that it's an AGP card? If so, that's a problem. AGP has been abandoned in favor of PCI express. AMD dropped AGP with the socket 754 platform but there are some Intel socket 775 boards that support AGP.
If you insist on keeping the AGP card, you'll have to build a system using older hardware. If that's the case, it's probably not worthwhile. It's up to you though...make the call & I'll see if I can make some suggestions.