1)ram type, in the case of ddr the higher number the better
2) dun u know when u buy ur pc?
3) if u mean for graphic card slot, check from ur mobo manual
for processor and mobo model, u can download a program called cpu-z

eh, graphic slot is mainly using pci-express 16x now, older 1 uses agp slot
pci slot is another thing
assuming ur sound card is is pci, u should not have problem installing it on a new mobo
btw, mobo is short for motherboard
but why want to use old soundcard? most onboard soundcard is better than older pci cards, and most ppl can't hear the difference also

geforce is not a brand, it's a series of card designed by nvidia, and then distributed to third party manufacturer like sapphire, asus, leadtek, gigabyte