Originally Posted by pc-illiterate
sometimes acc causes problems when it shouldnt. it happens. a few others here have posted strange behaviors with acc enabled. im too lazy to search.
it may be something else but i have no idea.
acc was also introduced to aid overclocking in the original phenom series processors. according to amd, it serves no purpose for the phenom 2 series processors though others disagree.
Haven't posted in a long time, but backing up the comment that ACC has little to no affect on the newer Phenom II chips. The malfunction experienced noted by the previous poster is probably due to using ACC with Phenom II chips.
There are a few people who know an understand all the tech details, but finding all that tech stuff (proprietary information) published on the web will be difficult if impossible. Most of the infos regarding this is based on users experimenting with the chips.
The old (now old) 7750 noted in sig is still chugging happily along at 3.1 ghz, and I've left it alone.
But I still cannot unlock my 550BE. Gave up a long time ago.
OCing the 550BE to 3.7-3.8 ghrz is working well, but every once in a while my system just locks up and I must hard boot. It is not a temperature issue given I have a very good cooler. Over-volt way too much will drive up the heat, but even over-volting doesn't seem to affect stabilization in any observable manner.
So, back to square one, what makes my system lock up? If the Chip isn't over heating then either I have a chip that just squeaked by the quality control checks. Or my video card or RAM is faulty. I don't over-clock my Vid-card, and rarely push it's limits. Still using OCZ RAM that does function in an overclocked state, but never have found it to be faulty. And have a solid power supply. Running RAM at BIOS stock settings offers no observable stability benefit.
Only think I've changed is switching from WinXP to Win7-64bit. I don't see any BSOD's anymore, but now it just randomly locks up. Screen "pauses", and the controls lock. After reboot and everything works fine. This happens maybe once a month at the most, and I run my machine daily, with extended gaming sessions 3 nights a week.
I dropped OC a bit and observed cooler temps, but every once in a while no matter what I do the system "hickups" and locks. So far I can identify no observable pattern to the lockups.Edited by Mithral - 10/3/11 at 9:41am