help from a psx emu guru

im not exctally new to the emulation world but i have been having problems with finding a decent emu that will run full speed on my cpu. I have a compaq presario 5441 with 256 ram,amd k62 500(just about) mhz processor a horrid 8mb video card that doesnt support open gl (sis 620 i believe) i really dont have the option of buying a new pc right now so in the mean time im wondering if there is a decent/good psx emu that would run at a normal speed,all i need it for is ddr basically

any help would be nice,thanks in advance,sorry for my lack of punctuation(sp?)