I know speed is a funny thing with RAM so I hope I can get some help here.
I've tried to get this board to auto-detect this RAM's settings: It's currently a 1GB DDR2 stick of Patriot memory, advertised as (through NewEgg) having 4-4-4-12 timing at 2.1V. My BIOS (I've tried an 'updated' beta BIOS from Asus, which didn't change it) has Auto-detect on in the areas of Voltage and timing. I've been able to 'edit' the timings down to 4-4-4-12, which CPU-Z detected, and can only assume that it increased the voltage automatically to meet this requirement. However, as you can see, CPU-Z detects it at only 400MHz, half of what it should be. Using Memtest86+ gets me approximately the same issue, reaching about 3000MB/s under their readings.