What does the number of pins on RAM do aside from having to choose a compatible mobo?

[Darkhosis]

As title states, or am I wrong in something?

 

[GD695372]

The pins are connections between the mobo/expansion card and the memory module. Different mem types use different pin counts(to an extent anyway). The question's kinda hard to answer really.

Examples:

30-pin SIMMS
72-pin SIMMS(FPM, EDO)
144-pin SODIMMS(SDR SDRAM, EDO DRAM)
168-pin DIMMS(SDR SDRAM, EDO DRAM)
168-pin RIMMS(RDRAM)
168-pin QIMMS(RDRAM TERMINATORS(I may be wrong on this))
184-pin DIMMS(DDR SDRAM)

I'm missing some stuff but the list is fairly complete I think. Hopefully this helps.

 

[Darkhosis]

Thanks a lot, it does help.
I'm planning to get 2 sticks of 256MB PC2100 DDR RAM, and I'm guessing I need a board with 184-pin DIMMS.

 

[Athlon4all]

Yes, DDR boards have 184-pin DIMM slots.