Quote Originally Posted by John P. Myers View Post
Max RAM is 2GB DDR PC3200

Only slots on motherboard are 3 PCIs, so gonna need 3 of these as the best you can do: http://www.newegg.com/Product/Produc...82E16814500221 They should get you up to ~210k credits/day

The CPU can only be upgraded to a P4 so really not worth it.
I just did this to a HP Dual Core and with the 3 GPUs John recommends it cranks out 200k daily now from dirt for a $150 investment. They had them at comp usa for $50 after a rebate.

I just added a USB fan to cool the GPUs but you may have to add an extra fan or such as I also left the case open.