How can I get my comp stable @3.8ghz? I have my volts at 1.5v for my cpu, it idles at 29c. my NB freq at 2400mhz and my cpu freq at 204. But it isn't stable, I can get my system to start up but as soon as I run prime95 or AMD overload it crashes and blue screens.
Once again, I'm new to overclocking. I have it stable @3.4ghz, I ran AMD Overdrive for 6 hours and it didn't crash or slow down.
Here's my CPU-Z on 3.7ghz
There is no way your NB could be running at 2400MHz, that's your HT speed, and the CPU freq you stated being 204 would be your NB/bus speed. Refer to the screenie of my 939 Socket Opteron 175 with the CPU-Z reading in this post as an example of this. You'll note my HT speed is 1180MHz and my bus speed is at 295MHz.
Also know your temps at idle will not be the same as they will be under load, meaning when you have the CPU performing work such as doing a run in Super PI or the Wprime bench.
Temps will spike in a hurry once the CPU begins doing work and if temps get too high, you know stability goes out the window.
One more thing to think about is the more cores you have going the more heat that's being generated - Normally chips with their cores unlocked will run hotter with the same voltage used than those with these extra cores turned off.
Phenom II CPU's are temp sensitive anyway and 1.5v's with the cooling you have for it is simply too much voltage to expect stability at higher clocks with the cooling you currently have.
You'll see better results with a lower voltage used simply because less heat is generated with a lower voltage used for what you are trying to do. To get an idea of what voltages can be ran for the speeds you want, you can take a peek at this thread if you haven't already:
Note what I did with my 720BE was indeed well over 1.5v's but my setup is on watercooling and I had some really good ambient temps going. My 720BE can and has gone over 4.0 with as little as 1.44v's before and is perfectly stable doing 4.0 with about 1.47v's used, no prob but my chip (unfortunately) doesn't unlock.
Edited by Kryton - 1/9/11 at 1:43am