Depends on what you mean by bottleneck. What are your framerates or 3Dmarks like? I think there are a few other threads about 9700 pro's with crappy 3D marks, take a look around for some of those. Otherwise, you're 1750mhz is pretty much a 2100+ I couldn't imagine that slowing you down too much. The only reason to upgrade might be to a 333 bus to match the ram.
if you're trying to be thrifty, stay with your current processor. games are incredibly video card dependent right now, anyways. with all their fancy shader gadgets and whatnot.
but if you only have 1x512mb stick of memory, i'd consider getting another. games have been taking advantage of over 512mb of memory for a while so 1gb is a good amount right now to last you a while. you'd get better framerates with the dual-ddr, too. try to get a stick as close in likeness to yours as possible (brand, speed, model).
installed the ram backward, fried to ram, friend the ram module. now im RMAing both speratly to try and not draw attention to the fact that if they matched it up, they would see i installed it backward.
ram goes first, then if they replace it, motherboard goes.
Ep, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS