problems overclocking san diego 4000 in Overclocking and Cooling Posted August 24, 2006 i have been unsucessfully trying to further overclock my athlon 64 4000 san diego to something higher than 2.6 ghz, where it seems the most stable, but anything over 220 fsb X12 is not working at all, at any voltage. I need to find out if someone else has the same ram as me and if so, did you loosen the timings to squeeze some more juice out of the processor. anyone with my rig specs just post your timings if at all possible, for i cant get any settings to work. i have an arctic cooling freezer 64 pro that keeps it at ~41C load temp so overheating isnt an issue yet, just stability. also, is there a cpu voltage that you had the most luck with on this processor?