hmmmm, I think this is the chart to go with your board.....looks like you are already nearly maxed out.
http://tw.giga-byte.com/Motherboard/...ist_GA-7DX.htm
the fastest the chart shows for that baord is a xp2100. I see after the xp2100 it goes to some "-" and then to "n/a" so Im not sure what the "-" stands for, lol.
I saw a 7dxe listed and it showed it used up to an xp2400.
hard to say for sure...but either way, doesnt look like it'll run any 333fsb stuff.
JP