XFX XXX 7900 GS or XFX XXX 8600 GT which one do i choose? idk whether i want DX10, but i need some card for video... so which one?? i will be running vista they are both same price.....
Slightly? overclock them both and the 7900GS beats the X1950PRO which the 8600GTS is slower than. The lack of DX10 won't matter much when by that time neither of those cards will be able to handle DX10 games very well I think. Go for whats faster now and then sell the 7900GS later and get like an 8800GTS if you really want DX10.
you can use whatever you want. I use riviatuner but ATI tool works just fine too.
You overclock to around as fast as the card is stable. Mine likes around 600/830 so it doesn't get baking but it can hit up to like 625/840 if i had better cooling.