What ? My machine is P4 1.8 Ghz and GF4mx400 128 mb with 256 mb ram. And I run games on 1280*960 32 bit with the nice settings of Pete's D3d plugin (and Hi-res 2xSai enabled too) . And it's 55+ FPS . Sure there is something wrong you've made. Maybe wrong drivers. It's not the cpu at all, unless you've made some random settings which can't be put together.
Even my old PC was able to run PSX games with average 30 FPS on 1024*768 on Voodoo2 sli 32 mb and AMD K6-2 500 MHZ and 56 mb ram.
Even my old PC was able to run PSX games with average 30 FPS on 1024*768 on Voodoo2 sli 32 mb and AMD K6-2 500 MHZ and 56 mb ram.