|Performance is in the FSB, not raw clock speed.|
I'm not sure where you're at with your settings now, but you should lock the PCIe at 100MHz, do NOT use Auto. And as I stated, the CPU & RAM should run at the same frequency. Do NOT use Auto for your RAM setting. Make sure you understand what frequency means...it's not the same as the FSB. For an Intel system, frequency = FSB / 4. In other words, 800MHz FSB = 200MHz freq, 1066MHz FSB = 266MHz freq, 1333MHz FSB = 333MHz freq. I doubt you have DDR2-900 RAM, more than likely it's DDR2-800. RAM frequency = advertised speed / 2. 800MHz RAM runs at 400MHz freq. 400MHz is approx 20% faster than 333MHz, so the Auto setting would NOT be optimal.
In other words, if the CPU freq is set to 300MHz, the RAM should be 300MHz...if the CPU is 315MHz, the RAM should be 315MHz....if the CPU is 333MHz, the RAM should be 333MHz. That is what the 1:1 ratio is all about.
I caught an error I made in the previous response: "it *may* be called 1:2". It should be "it *may* be called 2:1"
I'll download the manual so I can review the BIOS chapter. I'll post back later.