I recently bought a MSI K9VGM-V motherboard, and equipped it with an AMD Athlon 64 X2 4200+ (Socket AM2) dual-core processor.
I have installed two memory modules from Kingston (1024Gb DDR2 PC533Mhz), which should give me 2 gig of memory.
When both memory slots are used, the PC does not boot and beeps during POST (indicating a memory problem).
When slot 1 is filled and slot is empty, the PC boots with 1 gig of memory. I did this with both modules, both are in working order, they just cannot be present both at the same time...