Sir/Madam,I have a PC which hardware/Software configuration is given below.Pentium(R) Dual-Core CPU E5400 @ 2.70GHz 2.70GHzP5KPL-AM/PS (SERIAL NO. A5M0AF217378)OS - Windiws 7 64bit.I want to know this configuration PC should support more than 4 GB RAM ?Which Graphics Cards are compatible in this Configuration ?Please reply..