fook me not an easy one to find .. google it and there is loads in chinese and french .. but little in english .. even msi don't list it on their site
presume its a Compaq presario

from what i have found... its a 478 chip mobo

Memory Type DDR
Memory Speed PC 2700
Memory Sockets 2 DDR-DIMM
Maximum Memory 1 GB DDR 333/DDR 266

so 1 gig is your limit .. time to get another mobo and upgrade.... or even a new pc...

i love a challenge but that was hard work