DO NOT - I REPEAT DO NOT GO FOR ANOTHER K7S5A!!!
Frys keeps offering these in motherboard/CPU combos and they suck! I'd just go to Frys and see what they have in stock that's not an ECS.
I can't recall what I just put in a friend's computer, but the ECS's are pieces of crap. I got lucky and got a good board once (it's running www.sd-3.com
(I fear it may crash every day)), but two of my friends, liking the Frys bundle bought these - it took us a couple weeks to straighten everything out - finally ended up getting a higher-end board and works perfectly in both computers.
As sn9ke_eyes said, he needs to go up to DDR. You can usually get 512 MB of DDR for ~$100 and it's a good investment. Once you get the DDR, it opens up a lot of great options - there's the Soyo SY-KT333 (or KT400) and quite a few NVidia based mobos.