Well this has been fun :-)
Under Ubuntu Linux 11.10 I have tried to get the Z68V-Pro to boot above the 46x multiplier. I've tried all of the suggestions in the list to no avail. Not to worry as I think that cpu temps may be an issue here in the summer anyway (often gets above 45C ambient).
Besides this being my workstation it also crunches Seti Workunits on the CPU and GPU - so its pretty much running at 95% to 100% all the time its on.
So since I cant go up I thought I would go down.... with voltage.
I've been using the the offset voltage as it seems to do the trick under all my other scenarios. I had started with a + 0.04V offset. (Note I had this up to +0.05V to try and get it to boot at 47x multiplier.)
Anyway I started to decrease the offset voltage. My initial benchmark was to reduce it until it didnt boot, then come up a couple of increments above that.
So at - 0.05V it didn't boot. I upped it to - 0.04V and it booted. I am now running Seti at full CPU usage, its the only way I can really push the computer under linux (I dont have all those fancy Windows tools - and the ones available for Linux dont push the CPU any where near as hard that Seti does!).
So now my Vcore is fluctuating between 1.31V and 1.32V, occasionally hitting 1.33V. This may not sound like allot, however before I started this little test it was hovering around the 1.4V to 1.41V level. So its a decent drop in power consumption.
I also noted that dropping Vcore also had DRAM voltage dropping. From the original of around 1.6V to a nice 1.525V.
So far all stable - we will see what transpires over the next few weeks.
Cheers Edited by thinkingbeyondthesquare - 10/8/11 at 3:03am