I'm sure it would help make your system run a bit smoother if you're not coming close to the 256 meg usage barrier.

However, and 128megs isnt expensive by a long shot, but if you can id suggest just investing in upgrading the whole kit and kaboodle. At least a motherboard that can support memory usage of more than 256. I mean, god I came late in the game and haven't seen one that can support less than 512.

Dunno where you live, but I'm sure you can find a store that has sales going on for CPU/MOBO combos. Best you can get are 80-150. Good deals.