Indeed, I am very serious about mining, and am looking at ATI cards that can produce 24x the mhash performance of my card! According to the hardware comparision link that was posted - AMD/Radeon 5970 can produce roughly 700mhash/s! I may purchase 2, however I think I will have trouble with my current motherboard [M4N98TD EVO has nforce n980 chipset]. I may get an equivielnt with crossfire chipset!
I still have windows 3.1 on small dedicated HDD, never use it though unless i need a good laugh.
I still have windows 3.1 on small dedicated HDD, never use it though unless i need a good laugh.
Cross Fire not needed for mining with multiple GPU
So your old board should work just fine. They don't even need full 16x speed PCI-e slots, 1x would do just fine too although you might have problems fitting the card in without an adapter/extender.