I am canceling my pre-order (from Steam)

[MadBlaster]

I think you set it on MANUAL, and then put in individual timings based on what your ram will tolerate. Check the documentation that came with your ram for the specs. Generally, the lower the timings, the better, and first you adjust timings before voltages. Then you have to test for stability and heat. It's been a while since I overclocked.

[Devastat]

So you mean that 600mhz DRAM is faster than 900mhz DRAM?

[MadBlaster]

No. Actually I'm thinking when you go to MANUAL mode, you may be able to bump that up to 1600mhz cuz that's what you say your ram is rated at? But I don't know for sure. There may be a multiplier effect going on where you have to divide the rating. I just don't know off hand with your setup. I would have to do some research to figure it out and I'm about to fall asleep (lol).

The "timings" are the other settings (e.g., tas). Get those from the instructions that came with your ram or the company website.