One time when I set my BIOS to load all default settings, I noticed that my memory voltage was set at 2.65. I thought that 2.5 was the default voltage. Someone at MSI forums told me that 2.6 is the default voltage of DDR 400. Ok so I put back my settings at 2.65 volts and tested with Sisoft Sandra at both voltages.
With 2.5 volts I get memory bandwidth of 4,965 at 2.65 volts I get slightly lower at 4,953. Why does it go down?