Some day you will have to make the transition to a up todate board.
In the financial world it is said that as/if the world economy strengthens, memory prices will rise, right now memory prices are cheap, could be the time to make the transition. 18 months ago I paid £104 for 512kb DDR 333Mhz memory stick, you can get it today for less than £50. Plus a current board supports 8xAGP cards. Personally, I would rather stick with what I had got, rather than waste money on another old board. Mind you you could maybe pick an old board cheap on Ebay, that would take a bigger chip plus your old memory ?