AMD Phenom X4 9750 Quad Core Processor HD9750XAGHBOX - 2.40GHz, 4MB Cache, 1800MHz FSB "usable ram problems" Questions

...ram it can use, you are showing 2.75 maybe because some video board is integrated in your motherboard and it may be borrowing an extra 0.25GB from the 3GB that are usable under windows XP 32bit OS. ...