you do have to watch out in adding to much memory on those P1 chipsets cause on the 430 MX, FX, VX, TX, and HX with sertian types of memory could cache max of 64mb ram, so adding anything over 64mb ram would result in the system operating slower. altho some could support up to 512mb ram

i have a P1 system and it has a mobo with a 430VX chipset in it and i installed 128mb ram in it amd i did see a performance drop. altho it did benifit in having more ram (not swapping to the HDD as much) it did slow down the overall performance.

but still it was a nice system to use to play old games on that will not run on a faster system.