I have kingston hyper X 256x2 Ram. I am trying to set my ram for best performance while doing some mild overclocking. It's timings come at 2-2-2-6. I have found that I cannot run it a 200mhz or it will freeze when stressed. Why is that? I have to back it down to 166. Also, how do you determine the best settings for you ram. BTW it is pc3200 400Mhz