Unofficial Opteron 939 Thread in Overclocking and Cooling Posted October 29, 2005 I have my nF4 now and have gotten a good enough grasp of it over the last couple days to put up some initial results (see first post). I'm still learnnig, and may improve some as I beome more familiar with the intricacies of the BIOS settings. Most notably, while my memory will fly at read preamble of 4.5, I have not been able to stabilize it at 7.5 at high frequencies. This may be limiting my overclock, but may not. Time and tweaking will tell. I moved my nF3 results to post #3 for those who are interested in comparing the two boards. My general impressions are that the nF3 did a great job, and that the nF4 has not led to dramatic improvements. The main differences between the two rigs are the use of an X800 versus an 7800GT, and 2T timings versus 1T. If your GSKill FF's TCCD then your should be using bios 510-2Fix, then follow my timings in above post in 64 tweaker. I've tried many different bios's and this kicks all butt.