|"I also learnt why I had had so many RAM issues with this motherboard"|
There's no reason why you can't run 3 double sided sticks of DDR400. The only thing that will happen is it will run as DDR333. If you're overclocking that is EXACTLY what you want anyway. As you increase the CPU frequency, the RAM frequency will also increase.
The problem with your board is that it doesn't have all the necessary BIOS settings to overclock properly. That's very common for VIA based boards. That's why nForce3 250 based boards were the board of choice for overclocking the S754 A64.
This is what you would need to do to overclock your system, IF you had the BIOS settings:
- lower RAM speed to DDR333 (166MHz frequency)
- lower the HT bus to 600MHz (3x)
- lock the AGP at 67MHz
- disable Spread Spectrum
- disable Cool 'n' Quiet
- lower CPU multi to 8x
- raise the CPU frequency to 250MHz.
The above settings will run the CPU at 2.0GHz, RAM at 200MHz (DDR400), HT bus at 750MHz.