I have an Athlon 64 3800+ X2 socket 939 I am trying to overclock. My motherboard is an Asus A8N-SLI Premium. I was using the AI Overclock set at 10% for a couple years rock solid, but I recently decided to push it farther. I can get it to boot into Windows as high as 2.6GHz, but it won't run Prime95. After some playing around I discovered that core 0 is the only one that crashes in Prime95. Core 1 will run all day long without breaking a sweat. Changing RAM timings and/or speed has a limited effect, if any. Does this mean I have a flaky cpu? It's Prime95 stable at my current settings below.
Athlon 64 3800+ X2 s939 E4 @ 2350MHz / 1.425v / HTT x4 (940MHz)
Asus A8N-SLI Premium
Corsair TwinX2048 C2 @ DDR470 (235MHz) / 2.5-3-3-6-1T / 2.75v
BFG GeForce 9800GTX OC
BFG 600w PSU
Athlon 64 3800+ X2 s939 E4 @ 2350MHz / 1.425v / HTT x4 (940MHz)
Asus A8N-SLI Premium
Corsair TwinX2048 C2 @ DDR470 (235MHz) / 2.5-3-3-6-1T / 2.75v
BFG GeForce 9800GTX OC
BFG 600w PSU