**Official e8400/e8500 Retail OC Thread

[Zucker2k]

I have a weird problem:

I have an E8400 and it runs from the beginning on 4ghz (1.264v real). When I tested with orthos(at the beginning) it runs perfect for 50 minutes. Then I stopped the test by myself.
But when I test it with orthos now(same votlage/speeds) it stops after 3 minutes..
What's the problem?

The PC is running perfect. I can play COD4 for 2 hours and also run a few 3dmark benches after each other, no problems.

Oops! Guess I spoke too soon.

[pH(x)]

I have a weird problem:

I have an E8400 and it runs from the beginning on 4ghz (1.264v real). When I tested with orthos(at the beginning) it runs perfect for 50 minutes. Then I stopped the test by myself.
But when I test it with orthos now(same votlage/speeds) it stops after 3 minutes..
What's the problem?

The PC is running perfect. I can play COD4 for 2 hours and also run a few 3dmark benches after each other, no problems.

What operating system?

And what programs and software have you installed since the first successful test?

[barzi]

What operating system?

And what programs and software have you installed since the first successful test?

A bunch of software. Begin was with a clean XP install. Now I have installed games etc.
OS = Windows XP SP3

But what should I do: 1.288v for completely stable(orthos too), or 1.264v for game/usual things stable? Only orthos failes, games etc. don't fail.

And is 1.288v a safe voltage? So definatly no degrading cpu?

[rge]

I have a weird problem:

I have an E8400 and it runs from the beginning on 4ghz (1.264v real). When I tested with orthos(at the beginning) it runs perfect for 50 minutes. Then I stopped the test by myself.
But when I test it with orthos now(same votlage/speeds) it stops after 3 minutes..
What's the problem?

The PC is running perfect. I can play COD4 for 2 hours and also run a few 3dmark benches after each other, no problems.

Given a couple degrees difference, my e8400 exhibits wide variability. At less than stable settings, it also exhibits variability at same temp. If you let it cool off some, ie turn off or idle for awhile and/or ambients drop or test on another day, you might find you can run it longer again.

But I think you are just showing typical variability of short runs of orthos with these E8xxx's +/- temps playing a role.

If you get it orthos stable at least 6-8 hours, and you can go to custom and set 8 to 64 small ffts in place (test like newer version prime), then on subsequent runs, while it may crap out at 3 to 10 hours or not, its highly unlikely to stop at 3 mins. Unless you have a defective CPU.

You may find that at temps less than what orthos produces, you are perfectly stable with less vcore than is needed to run orthos stable. Though in your case, stopping at 3 minutes, I would raise vcore, and at least get a few hours stable, consistently.

[M@deira]

Hi
After much time has come my E8400, my first result stabilising 4Ghz with lower voltage possible

[ThatGuy16]

What cooling are you using?

[M@deira]

What cooling are you using?

Cooler Box

[xVeinx]

A musing: are the instances of degradation/dead chips resultant from over voltage and electron migration, or are they due to temperature? Most comments in this thread, especially initially, were that degradation and migration would take significantly more time than the matter of days and weeks from whence issues have arisen for people here. Since the chips seem to be so temperature sensitive, is it possible that the higher temps reported might actually be real, and hence the processors are essentially cooking themselves at anything over stock? Again, just a thought, but I'm in the process of tweeking my own E8400, and I want to think about what I do before I screw up my own processor. I also should think about another cooler since I'm using the Intel stock cooler ...

[mrcape]

>1.6v PLL, >1.2v VTT (fsb term), >1.365vcore, >62c

Personally, I'd avoid doing any of the above with 45nm. xVenix, you have a point, but it's still kinda early to say. I will say that I have heard from reputable source that high pll is the culprit on some of the chips he's seen fried. It's a problem if people only consider vcore and temps.

[zlojack]

Funny, I keep getting errors on Core 0

I ran Prime95 last night at 8x500 on 1.29v and core1 was fine, but core0 crapped out after about 30 minutes.

This morning I left it running with 1.31v (bios) and this afternoon when I got home, same thing... core0 crapped out after 30 minutes, core1 is fine.

[HaTaX]

zlojack, you might want to try adjusting the GTLREF for that core up and down a few percentage points to see if it helps with stability on the first core.

I could definitely see high PLL voltages being a problem, it has been practice with the 65nm chips to increase the PLL voltage before the core to attain a stable overclock. Perhaps you need alot more voltage on PLL over 4ghz, but I have it currently set to 1.17 and I'm seeing 1.18 in hardware monitors.

[laragirl83]

I can't see how people can do assumptions that they have STABILIZED their system by running Prime95 for 30 mins or so..... omg....

When I was in test phase, it happend for many-many times over the years that orthos/prime gave me an error after 5+ hours of testing....

So pls, dont do this, lets just say, u MIGHT have a chance to make things stable...

[dogsx2]

I can't see how people can do assumptions that they have STABILIZED their system by running Prime95 for 30 mins or so..... omg....

When I was in test phase, it happend for many-many times over the years that orthos/prime gave me an error after 5+ hours of testing....

So pls, dont do this, lets just say, u MIGHT have a chance to make things stable...

If it is stable enough for them to use daily and no crashes who cares??????

I think you should take your car out and run it as hard as you can for 12 hours to see if any parts will fail on it. A car is more important then a benching or overclocking computer.

[cadaveca]

Not to me it isn't. PC makes me money, car just sucks it up.


Cost of car = FREE

Cost of PC= $2k...

Importance of pc vs car...pc wins

Car dies...no loss of income.

Pc dies, guaranteed loss of income.


HMmm....wanna rephrase that?

[M@deira]

I can't see how people can do assumptions that they have STABILIZED their system by running Prime95 for 30 mins or so..... omg....

When I was in test phase, it happend for many-many times over the years that orthos/prime gave me an error after 5+ hours of testing....

So pls, dont do this, lets just say, u MIGHT have a chance to make things stable...

Tested only 30 minutes of Prime95, because this time I can run any test bench and not have error in any core.
This is stability for me, not beholden running days and days of Prime95 to prove nothing to nobody mainly to you.

Try it and post here.

Sorry for the bad english

[hersounds]

here my e8400

[rge]

Tested only 30 minutes of Prime95, because this time I can run any test bench and not have error in any core.
This is stability for me, not beholden running days and days of Prime95 to prove nothing to nobody mainly to you.

Try it and post here.

Sorry for the bad english

If you only need 30 or 60 minutes of prime to suit your needs, because you personally have found that at that level you usually dont have problems, no one really cares. Not to mention if you do have problems, you can just bump up vcore then. Just like no one cares if someone else needs 8-12 hours of prime to suit their needs, because at that level, their personal use has shown that they dont have problems only then.

But, I think you need to read the context in which someone posts, before concluding someone is asking you to prove something. The original person was complaining of running prime 50 minutes once, than worried it was degrading because it only ran 3 minutes second time. And the RESPONSES TO THAT were that 50 minutes of prime is not long enough (given variability of short runs) to prove you are stable enough to repeat it and thus you can not conclude you are degrading, when it is more likely you simply did not have high enough vcore to consistently run prime stable over an hour. For instance, maybe you picked a voltage that would have run prime for 8 hours, and thus can consistently run over an hour. Or maybe you picked a voltage that would have stopped at 62 minutes, the next at 8 minutes, the next at 40 minutes, the next at 3 minutes.

Then you chimed in complaining that someone was asking you to prove something???

As an aside, why prime at all if only interested in stable enough to bench...I can bench 32m spi, 3dmark6, 3dmark5, pcmark5, at a point where I not even prime/orthos stable at 2 minutes.

[zizo]

My final overclock with a broken sensor.

[Infa]

I can't see how people can do assumptions that they have STABILIZED their system by running Prime95 for 30 mins or so..... omg....

When I was in test phase, it happend for many-many times over the years that orthos/prime gave me an error after 5+ hours of testing....

So pls, dont do this, lets just say, u MIGHT have a chance to make things stable...

Not to me it isn't. PC makes me money, car just sucks it up.


Cost of car = FREE

Cost of PC= $2k...

Importance of pc vs car...pc wins

Car dies...no loss of income.

Pc dies, guaranteed loss of income.


HMmm....wanna rephrase that?

Why rephrase? the major part of us here dont care if the cpu are stonerock superduper solid 24h+ , most uf us also do have a less benching computer aside from the monster bench machine most of us do got.

i can also do alot of stuff with less vcore than the prime can take.... the word "stable computer" are whats stable for YOU as a person, theres no rule for this, dont think u can call other peoples cpus "crap" just couse you think you want a PROOF of 18h prime, why do that? and if you are so addicted to your comp, why running it OC at all? risking it to crash if its so important.

well well, u cant come to XS and complain why people dont show of 20h of prime haha..

[rge]

My final overclock with a broken sensor.

nice OC with that low of vcore, and nice VID...below is my orthos run at 1.32vcore and 4.2ghz...wanna trade?

[dogsx2]

Not to me it isn't. PC makes me money, car just sucks it up.


Cost of car = FREE

Cost of PC= $2k...

Importance of pc vs car...pc wins

Car dies...no loss of income.

Pc dies, guaranteed loss of income.


HMmm....wanna rephrase that?

Not really, do you walk to work? Computer worth more then your car??

That's called $50 socks and no shoes.

[unclewebb]

zizo: 4202MHz @ 1.32 volts is excellent. Maybe you could add a picture to the Wikipedia and show the world what a grade 'A' E8400 looks like! What's your date and batch code (Q7--A---) printed on the top of your processor or from your box? I've run my E8400 at 4200 MHz but to be Prime stable instead of needing 1.32 volts I'm probably going to need about 1.42 volts. I haven't decided whether I'd push it over 1.40 volts for 24/7 use. Probably not.


I've noticed during testing that whenever Orthos fails it always fails on Core0. That made me realize that Core0 is definitely the weakest link but I was curious to know just how weak is it?

I dropped the core voltage to 1.28 volts and loosened the timings to CL5 and booted up at 9x401MHz. I decided to run SuperPI on each core individually by doing a SetAffinity... in TaskManager and forcing SuperPI to run first on Core0 for some testing and then forcing it to run on just Core1.

Using SetFSB, I kept bumping up the MHz until SuperPI would fail on each core. Because Core0 seems so weak I thought this test would show a large difference in each core's abilities but it didn't.

Core0 could do a SuperPI 2M run repeatedly at a FSB of 449 MHz. As soon as I bumped it to 451 MHz, it failed.



I tried the same thing on Core1. It could run at 451 MHz and 453 MHz but at 455 MHz it failed and locked up the computer.



This test confirmed that Core0 is the weakest link. The FSB where each core could run SuperPI 2M reliably at 1.28 volts was only a difference of 4 MHz (449 vs. 453). Not really a good enough reason to EBay it off. You might want to try this same sort of test using the single threaded version of Prime95 and then swap it back and forth between cores until you find your weakest core. SuperPI benches like this would also give you a good baseline before priming at high volts and high MHz for 82 hours. It would be a great way to test for a degrading CPU, sometime in the future.

To finish off testing I reset everything to my 24/7 OC and did a couple of SuperPI benches. I'm hoping some other users can do me a favor and post their 1M and 8M times at 9x450 using similar memory timings or even with DDR3. I think my P5B Dlx is still competitive and I'm interested in finding out how it compares to some of the newer Intel boards when the clocks are more or less equal.

1M = 11.515s


8M=2m 28.937s

[Ajarn]

Just got my E8400 two days ago. Trying to find the max FSB without increasing the vCore one bit (set at 1.1v in BIOS). So far my results are 6x500, but I haven't stability tested it yet (hoping to find SS max FSB first and then work down). System is in the sig.

Ohh, also first OC related post

[PytonOrm]

What is Wr on E8400 and air ???
i was enable to break 5107MHZ on asus commando and i was near even 568 x 9 to but when i save it so i got black screen, motherboard and vcore at 1,7v reading in bios, but when i forgot to update my cpu-z to ver 1.44.1 then was my cpu.cvf file was not uploaded correct at my validate so i must try again and take it

[user1234]

Not to me it isn't. PC makes me money, car just sucks it up.


Cost of car = FREE

Cost of PC= $2k...

Importance of pc vs car...pc wins

Car dies...no loss of income.

Pc dies, guaranteed loss of income.


HMmm....wanna rephrase that?

True, for me as well stability and reliability of my machine is above all. I don't want a random crash EVER (been there, done that). So I'm willing to sacrifice a few percentage points of performance for stability