**Official e8400/e8500 Retail OC Thread

Hi guys!
Based on my bios settings....what do you think I should try to get more out of this?

E8500 E0 Q827A353
http://img171.imageshack.us/img171/1737/imgp5725ri7.jpg
By shaolin95
http://img171.imageshack.us/img171/9946/imgp5727rp1.jpg
By shaolin95
It would seem that I need a lot more voltage to move up from here.
The memory at those timings and FSB and beyond that (520).
I did try relaxing the memory and didnt help either.
It seems that I m stock at 4.2ghz.
With a Scythe Ninja first gen I am afraid of giving it too much juice. According to cpu-z under load the vcore drops to 1.336

Thanks for any recommendation.

PS Do you think I should ask here or in my mobo's specific thread?

Quote:

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Originally Posted by LennyRhys

Yeah, 1.3v from a C0 is actually pretty good. My C0 didn't even do 4GHz at 1.4v, but fortunately I sold it. :D

My E0 isn't as good voltage-wise as some of the E0s on this board, but it's incredible in terms of load temps. At 4.3GHz (1.312v) my load temps are 39C. Your chip is not exactly hot at 56C, but what cooling are you using? I've never seen even 50C from my chip yet, even at 4.4GHz 1.352v.

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Sorry to burst your bubble but 39'C under load with your 9700 is a no way... :rolleyes:


Unless u have <10'C room temp (living in an igloo) or u're not loading correctly your cpu.

Quote:

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Originally Posted by JoeBar

Sorry to burst your bubble but 39'C under load with your 9700 is a no way...:rolleyes:


Unless u have <10'C room temp (living in an igloo) or u're not loading correctly your cpu.

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An igloo at 9°C? I'd love to see that...

E8500 E0 @ 4.4GHz 550*8 at 1.392v :(

Quote:

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Originally Posted by Dom7184

E8500 E0 @ 4.4GHz 550*8 at 1.392v :(

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That's because of the low multi. With the 9.5 multi it could probably do 4.4GHz on closer to 1.3v. Taking the multi down even just half a step to 9, I need a lot more vcore. Why is your FSB so high lol?

Quote:

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Originally Posted by WaterFlex

lochabar
Great job. But I think vNB is high. Try to clock 500x9 and decrease vNB to 1,3.

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Alright, this is one hour OCCT stable also. All settings are the same as the 8.5x/530FSB run, with the exception of the v NB being 1.40 instead of 1.55. Turns out this made the CPU temps lower during load. Max was 66c and average was probably 60c. I kind of butchered the screen shot resizing it, lol.

One weird thing, all of a sudden, memset isn't reading my timings right. I have everything set via the EPP 500 spd you can see in the screen shot. There is no saved timings profile, so memset isn't loading these settings at startup, no idea why it is reading this. EDIT: the tRFC reading of 55 IS correct.

I ran some quick Sandra RAM bandwidth benches at both settings and the numbers are within 400 points with the 530 FSB run being the higher of the two, so am now debating which way to go for 24/7. The age old tighter timings/lower performance level, Vs. higher frequency slightly better bandwidth question. I might even be able to get 8.5x530 with the 1.40 v NB, haven't tried yet.

If this screenie is unreadable, I'll do another run and retake it. Let me know.

Nice speed lochabar, what is your batch number? If you want to know which of the 2 settings is faster, do a superpi 32M run at each setting. The higher FSB setting may win out, but if its only a little better and it requires more voltage/heat etc, maybe the slightly lower setting would be better for 24/7. It's unlikely you would notice a small difference in your day to day use of the pc.

You may be better off running say 4.4GHz & DDR2-1174 CL5 if your ram can handle it at a safe voltage.

Quote:

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Originally Posted by CryptiK

Nice speed lochabar, what is your batch number? If you want to know which of the 2 settings is faster, do a superpi 32M run at each setting. The higher FSB setting may win out, but if its only a little better and it requires more voltage/heat etc, maybe the slightly lower setting would be better for 24/7. It's unlikely you would notice a small difference in your day to day use of the pc.

You may be better off running say 4.4GHz & DDR2-1174 CL5 if your ram can handle it at a safe voltage.

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Batch # is Q832A161. The highest I've gotten this RAM is 1152 and it didn't want to stay there for more than a few hours without errors. I had to dig through some older screen shots to find that and to be honest, I'd forgotten I'd ever gotten it that high. That was while running the CPU at around 4.0 Ghz though. That makes me curious to try a run at the higher RAM frequency with the CPU clocked up at the same time...

Quote:

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Originally Posted by LennyRhys

An igloo at 9°C? I'd love to see that...

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U're getting there... ;)

Quote:

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Originally Posted by LennyRhys

That's because of the low multi. With the 9.5 multi it could probably do 4.4GHz on closer to 1.3v. Taking the multi down even just half a step to 9, I need a lot more vcore. Why is your FSB so high lol?

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naw its the same with this mobo its a p965 chipset and the more fsb the better the bandwith

i own E8400 CO, TRUE120 and DFI P45-T2RS Plus.
i got 475FSBX9 stable with max temp of 62C.

http://img232.imageshack.us/img232/6...zstablecb8.png

i cant get higher then that.. any tips for bios setting?

Quote:

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Originally Posted by lochabar

Batch # is Q832A161. The highest I've gotten this RAM is 1152 and it didn't want to stay there for more than a few hours without errors. I had to dig through some older screen shots to find that and to be honest, I'd forgotten I'd ever gotten it that high. That was while running the CPU at around 4.0 Ghz though. That makes me curious to try a run at the higher RAM frequency with the CPU clocked up at the same time...

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Well, this RAM is rated at 2.1v max. I've been running it at 2.15 just fine, but 2.20v makes it feel way too hot. Without the extra V, 1062Mhz seems like the best Frequency/timing spot while keeping the vNB at 1.40. RAM bandwidth test in Sandra scores right at 9800 with these settings.

So, my sweet spot looks to be 8.5x/530 FSB for 4.5Ghz CPU and 1062Mhz RAM. So far anyway...

I am running my e8400 @ 4ghz with 1.225v set in bios and 4gb ocz memory @1069 on p5k premium with transaction boost 3. Working just great, passed 15 linx runs

I've been playing with an OEM E8500 C0 pulled from a Dell. Got it stable at 4.2 on 1.35v CPUZ. 4.5 for some superPi runs under 1.4v. Back on my Q9550 now.

now i am running C0 E8400 @ 466X9 1.42V set in Bios , 1.36V real , load temps priming around 68 , is it ok to leave it 24/7 on this , my ideal temps are not good either , it is around 50c rest of specs in sig

I was able to lower my vcore to 1.240v @ 4.23GHz. The LCD poster reports the load vcore as 1.237v although cpuz reports 1.240v, I'm not sure which is correct. Although I doubt it, I may be able to lower vcore further I will test it later.

10 trials of Linpack after 1 trial, you can see the load voltage
http://i266.photobucket.com/albums/i...GHz1240vDD.jpg

10 trials of Linpack finished, you can see the idle vcore, Vtt, vNB & vdimm
http://i266.photobucket.com/albums/i...3GHz1240vD.jpg

4.3 GHz @ 1.280v (cpuz) 1.270v (LCD Poster) load and 1.320v idle - Linpack Stable

LOAD
http://i266.photobucket.com/albums/i...Hz1280vDDR.jpg

IDLE
http://i266.photobucket.com/albums/i...GHz1280vDD.jpg

Cryptik what's your CPU temp like with such low voltage? Awesome chip btw :up:

Thanks. Load temps at 4.23GHz @ 1.240v are around 55*C and at 4.3GHz @ 1.280v are around 58*C. That is with ambient temp of ~22*C, in 30*C ambients you can add 10*C to each temperature.

That's with a lapped TRUE and a 54 cfm fan.

Quote:

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Originally Posted by CryptiK

Thanks. Load temps at 4.23GHz @ 1.240v are around 55*C and at 4.3GHz @ 1.280v are around 58*C. That is with ambient temp of ~22*C, in 30*C ambients you can add 10*C to each temperature.

That's with a lapped TRUE and a 54 cfm fan.

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Good Deal Bro:yepp:that's great would like to see sandra stress test mip's what your reaching under that Oc :yepp:in that Antec 300 are you running the top and rear factory fans with the speed switch that came with the case or different 1's?

guys are all 8400's currently at newegg E0's?
If not is there any etailers selling E0's?

thanks

http://kepfeltoltes.pirateclub.hu/pics/orthos_4ghz.jpg

I tried for 4.5GHz again by my E8500 just isn't having it. I went as high as 1.44v in BIOS, already a bit too high for comfort, and it lasted for only a few minutes. I'm settling for the same bus speed but with a 9 multi instead of 9.5, so CPU vcore is down to 1.328 under load, and nice temps of 41C after 2 hours of prime. :up:

I have been running this build since 9/15/08 at the same settings below without any problems.


http://i44.photobucket.com/albums/f1.../OCCT500x8.jpg
http://i44.photobucket.com/albums/f1...TTempGraph.jpg
http://i44.photobucket.com/albums/f1...x8voltages.jpg

http://kepfeltoltes.pirateclub.hu/pi...41cachemem.png

Ok the last two days here its been 46 degree's (so 115F), and 40 the day before and it would have to be 30 inside my place as its not heated up lol
(no aircon in the pc room hehe)

My OC as per sig did crash, so had to back it off a bit.
I could probably get the same in a tad lower vcore so i might play around when the weather becomes more reasonable.

But for normal room temps of 22-24 its A-Ok which is good. Im idle CPU @ around 44 degree so its fair warm when its usually 36 or something.
So something to work on! It might have been the ram also, will have to check it out as i can probably back some vdimm off there too :)