This is my setup: socket 939 AMD Atlhon64 X2 4400+, Gigabyte GA-K8N Ultra-9, 2x1GB DDR400 Corsair RAM, Leadtek 7800GT, WD250GB HDD.
The maximum stable overclock I can manage is 236MHz x 11 = 2.6GHz with the RAM at 2-3-3-6-1T running at 186MHz (according to CPU-Z). The temperature at full load with both cores at 100% seems to be about 56C, while idle is about 31C (according to SpeedFan). Also, I need to run the CPU at 1.475V (up from stock of 1.350V) for it to be stable. In addition, for me to achieve any sort of decent overclock, I need to set the HTT multiplier to 1x or it won't even POST.
Just out of curiosity, I tried a mad OC just to see how high I could go. I managed 280MHz x 10 = 2.8GHz with the RAM at 2.5-3-3-6-1T, but that was WAY TOO HOT (Vcore was at 1.650V)! I didn't do any stress testing at that speed; it just managed to boot into Windows.
What bothers me is the darn HTT multiplier which needs to be set at 1x and I don't like that.