**Official e8400/e8500 Retail OC Thread

[rge]

First off, I am not saying the cpu's are not degrading, in fact give some are dead, some probably are.

However, I am saying it is difficult to discern variability from stability using runs of orthos less than 12 hours, and hence if one is going to investigate how often degradation does occur and how likely given a certain voltage, more reliable tests need to be done, like 12+hour orthos runs or failure to boot at given setting when before it would boot and say run orthos short time or superpi. There is a huge voltage span ~.03v where I can go from highly variable orthos runs to 12+ hours repeatable orthos stability.

I have 3 computers, only time I surfed during testing was the time I mentioned it, hence I mentioned it...most runs I am either asleep or at work. Also, there is no question that temps play a large role, I have most reboots during longer runs of 67-70C.

Personally, I think when I can go orthos stable for 5+ hours, and start running into reboot problems, I can either drop my ambients 10C (open window) or I can increase voltage another .02V or so to the point where I can be orthos stable with high temps.

Instead of arguing how much degradation is occurring or not, why don't we collect the info in a manner that is indisputable and demonstrable, and quantify it?

If we get a lot of people at different voltages, that are willing to just do one run of orthos minimum 12+ hrs now and POST IT with core temps showing, and then same test a few weeks later, and maybe few months after that we can get an idea of
1) how often it occurs
2) what voltages are likely to cause the problem.

Mine are below and already posted in the thread, one of each. (EDit I put them below, dont know if posted 4.05)

I am orthos stable x 2 runs over 14hrs at 4.05 mhz with 1.3375 in bios (1.33 cpuz, have loadline on) at my normal ambient temps of 25-27C.

I am orthos stable x 1 run 19 hrs (forgot turn off) at 1.3625 in bios, 1.36 cpuz.

[cadaveca]

Instead of arguing how much degradation is occurring or not, why don't we collect the info in a manner that is indisputable and demonstrable, and quantify it?

I agree, but I'm sick of listening to people without these cpu's, or without any degredation posting that it doesn't happen...I mean really, it's not like I'm saying all are gonna die..I hardly think that to be true.

But all this crap posting about it not possible, merely gets in the way of us that do have issue comapring to see whether there is a common factor here that can prevent others from experiencing the same!

Now I've posted how my cpu has been. If you've read my posts in the past, you'll be aware that I won't even bench until prime stable. that's at a very minimum of 12 hrs of prime

however, I want to make something perfectly clear...it may very well be orthos and prime that are killing these cpus.

Currently, as far as I can tell, alot of newer baords feature dynamic phase control of the PWM. I've yet to investigate this, but it seems to me that when usage drops on some boards, so do half of the used phases of the PWM. It also occurs to me that it's more than possible that when this change occurs, there is a bit of over-compensation occuring on the remaining 4-phases, possibly overshooting voltage supplied to the cpu, and thereby causing the damage.

SO before you start priming...are you using an asus board w/ EPU, or a board with digital PWM? Do you think, even if remotely...that it could be prime95/orthos, two of the highest current-drawing stability tests there are?

If so, I'd hazard gainst using prime @ more than 1.3675v until we either find the cpu's or boards as faulty!!!!

[.OCX]

however, I want to make something perfectly clear...it may very well be orthos and prime that are killing these cpus.

Now this is the kind of stuff I like to see discussed!