Newbie MB vs GB question about RAM

Just bought 2x2GB of RAM and system info says I have 3199mb.

Is this numerical discrepancy due to the weird gigabyte-into-megabyte 'translation' or is my new RAM faulty/deficient?

Thanks.

Yup, it only recognizes and uses 3199mb becasue that's all the memory 32 bit supports, while 64 bit supports as much ram as you will ever need.