**Official e8400/e8500 Retail OC Thread

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11-30-2008, 01:04 PM
gurusan

Quote:

Originally Posted by ssabripo

has anyone experienced a need to boost Vcore after a while?

strange, but a couple of days ago my computer became completely unstable after 2 months of running super stable....random restarts often, and a couple of restarts that would end up in non-reboots; had to turn PSU off, and start over.

I bumped Vcore from 1.28750 to 1.29325 and a little better but still rebooted. Then up to 1.3000v, and almost good but had two more reboots. Up to 1.3250 and now it is stable again! I didn't want to run that high of a Vcore, so I went back to FSB = 430 (3.89ghz), and put the Vcore down to 1.2835 and now it is running perfectly fine.

my board is a Asus P5Q-E, see my sig for more details

I've had 15 wolfies and never experienced that.
11-30-2008, 01:26 PM
Infa

Yeah, on my second wolfie now, and both requires more after a while, this seem to have entered with 45nm ..
11-30-2008, 02:01 PM
DMF

Quote:

Originally Posted by co2r

ok. .will try your suggestion and increase the NB voltage a bit. I am trying to make at least 4.0ghz (so a 445x9). Should I increase the CPU volt a bit as well?

One thing at a time. Drop the CPU multiplier to get it out of the picture, then look for stable RAM at your target FSB. Memtest overnight with no errors.

Once you get your RAM stabilized, then forget about it and NB volts while you crank up the CPU.
11-30-2008, 03:37 PM
Mav451

Yup I should have been clearer, DMF has the right idea.

Ordinarily we'd do mobo FSB limits first (old school), but the presumption is that the Intel chipsets, particuarly your P45 these days can go far beyond RAM or CPU limits anyway.
Normally the RAM part would take quite a bit of time to figure out as well, but setting cas 5 should allow most cas 4 RAM to scale well beyond what your CPU will hit. Of course, confirm this with memtest and at 6x multi to confirm.

So once RAM latency and volts, necessary NBv for those respective FSB settings are in place, then it's pretty smooth sailing: CPU increases will then obviously require more vcore.
11-30-2008, 05:12 PM
JCGhz

Yes on every single one of my 4 wolfies.. I had to up the voltage to run prime stable. I've never had to up the vcore due to system instability. Doesnt have to pass prime to be stable.
11-30-2008, 08:37 PM
VOID WARRANTY

1 Attachment(s)

Quote:

Originally Posted by MJR

Where are you guys finding the E0 revision these days?

my e8400 came from new egg...but its still a luck of the draw...tiger direct advertises there e8400,s to be rev E0...but they charge sales tax in my state...:up:......QUESTION..do guy,s think 1.4200v vtt ((aka cpu termination)) will end up killing my chip for 24/7...im sure its a little less then whats set in the bios
12-01-2008, 02:25 PM
gurusan

just got another of the same batch as before of Q828A127. 1.25VID same as other but does another 75mhz on same vcore (4375mhz 1.39V)...will push it a bit more tomorrow with 1.4-1.42v and see what I get.

http://img505.imageshack.us/img505/2445/87424052yd2.png
12-01-2008, 03:13 PM
WaterFlex

gurusan
what about 500x9?
12-01-2008, 04:07 PM
gurusan

will try it tomorrow
12-02-2008, 10:38 AM
d.j.s.

I see a few more people got a Q829A congrats .

I will post pictures with a camera of my Air cooled
system and my temps I think you guys will be shocked.

I believe voidwarranty temp claims.
I know the chip will do crazy things , they are a fantastic batch.
lol vid 1.25 so that will prove vid means nothing.

Here is my q829a
http://i294.photobucket.com/albums/m...e35/600FSB.jpg
12-02-2008, 11:50 AM
MadMan007

I just received a Q829A159 from Newegg which I ordered on Friday, shipped from NJ warehouse. Hope it's as good as some that are posted here! It will be going in to a DFI P45 JR so I will likely be back to ask about all the extra BIOS settings that I'm not used to, I need to wait for a few other bits first.
12-02-2008, 06:01 PM
PolRoger

4 Attachment(s)

I ordered a new chip this past "Black Friday" and it came in today...

E8400-E0 Q832A161 with a packdate of 9/25/08. It has a 1.2250 VID. I've not done much testing on it but it appears prime stable (4 1/2 hours large FFT) at 444x9 with 1.20v idle and 1.184v/1.192v load!

My replacement E8600 Q820A727 (1.25 VID) which I recently got back from Intel RMA requires around 1.232v load to be stable at 4.0GHz. Hopefully this new E8400 will continue to scale with increased vcore.
12-03-2008, 12:12 AM
bigwill68

@PolRoger

Do got your northbridge fan hooked up?
I did'nt notice it in your TPower shot there
under the system fan rpm's just asking..
12-03-2008, 05:15 AM
gurusan

could not get get 500x9 stable but this is stable :)

4x1gb ocz @ 1187mhz 5,5,5,15 2.17v actual

http://img83.imageshack.us/img83/8/54210088gs2.png
12-03-2008, 05:32 AM
radaja

@gurusan,awesome!god i wish i could get my processor to do 9x500 or higher,maybe ill try 9.5x? and see how that goes. and again very nice clock
12-03-2008, 05:36 AM
gurusan

thanks. i've been through a fair amount of chips and this is the best chip I've found. stepping Q828A127....VID is only 1.25V

just goes to show you that VID really doesnt mean anything in wolfies :/
12-03-2008, 05:54 AM
radaja

yea the only thing i notice in vid is the lower ones run alot hotter. my e8400 w/vid of1.23 runs so hot that once i clock above 4200 i cant even run intel burn test cause temps rise straight up into the 70C's where as my e8500 never goes above 52C at 4300 on IBT.
12-03-2008, 08:26 AM
PolRoger

Quote:

Originally Posted by bigwill68

@PolRoger

Do got your northbridge fan hooked up?
I did'nt notice it in your TPower shot there
under the system fan rpm's just asking..

If you mean the Cooler Harbor fan that comes with the board... no I've never hooked it up. This m/b has never been installed in a case just on a HSPC open air test bench and if I need addititional cooling I just lay/prop up an extra 92mm or 120mm fan.
12-03-2008, 08:52 AM
Quad-Damage

You E8500/8400 E0 owner are so lucky.4.5ghz on way under 1.38 volts I have to pump 1.4 volts to hit 4.1 in my C0 on water

Think 1.5 volts will kill my chip? I want 4.5ghz :)

Might just wait till the quads go cheaper and do a 4gzh quad chip :)

Keep the overclocking coming. Anyone have a C0 with 4.5ghz or higher? How much volts?
12-03-2008, 11:07 AM
d.j.s.

Nice OC Gurusan we have almost the same batch it seems . Im loving it and benched a 3d suite 03,05,06 last night @ 533 *8.5
4530 I can do exactlly 1.408 but bumped to 1.42 for 3d stability , it went all night no errors and max temp on air was 50C !!!!!
It was my first run of that suite for a single gpu comp and beat the 8th spot I know this thing will do much more. Oh btw I am finding 1.22v MHC is really nice and stable for me @ 533 hope this helps guys .1
12-03-2008, 04:36 PM
ThatGuy16

Quote:

Originally Posted by Infa

Yeah, on my second wolfie now, and both requires more after a while, this seem to have entered with 45nm ..

After a couple months, mine went from 4.0 stable at 1.216v up to 1.248v. But i also have had my chip up to 4.6-4.7Ghz a few times. Not sure if that made the difference, but I've benched 4.6ghz alot since its needed 1.248v and it hasn't changed.

I still love my "low voltage" C0 :yepp:

I just wish my skills, or motherboard would allow me to get 4.3 stable. I really think its my board, orthos fails not matter what i do at 4.3. Though, i may be doing something wrong, I've tried tons of combinations with timings and volts. I may try the memory timings jacked up to 6-6-6-15 or so, next. :shrug:
12-03-2008, 07:57 PM
PolRoger

4 Attachment(s)

I did some more testing on my new E8400 (Q832A161 1.2250VID) today. I started off with +0.75v of cpu vcore using 500x8.5= 4.250GHz. At idle CPUZ showed 1.256v/1.248v and under load running Prime large FFT 1.240v/1.232v it seemed stable and after running a decent bit I decided to go for the what I consider the "big money shot" for 24/7 air overclock of 500x9 using +0.150v vcore. CPUZ was showing idle at 1.325v/1.320v and load was 1.312v/1.304v and sometimes vdroop would drop to 1.298v. I still don't have this completely Prime stable it has been failing around 2 1/2 to 3 hours large FFT. I'll probably put this chip in one of my other boards and continue with more testing.
12-04-2008, 03:53 AM
gurusan

that's a mighty fine chip you have there! congrats
12-04-2008, 08:45 PM
PolRoger

5 Attachment(s)

Quote:

Originally Posted by gurusan

that's a mighty fine chip you have there! congrats

Thanks gurusan.

It is nice to finally get a good one. :)

I bumped up MCH/VTT and I think it may have stabilized the chip. Using the same +0.150v cpu vcore setting and Priming large FFT... I noticed less vcore movement in CPUZ. Idle is now showing 1.328v and load stays mostly on 1.304v and I didn't observe it dropping below 1.3v like my previous settings. I'll now see if it can run overnight while crunching SETI/Climate Prediction.
12-05-2008, 08:25 AM
cincyrob

Quote:

Originally Posted by ThatGuy16

After a couple months, mine went from 4.0 stable at 1.216v up to 1.248v. But i also have had my chip up to 4.6-4.7Ghz a few times. Not sure if that made the difference, but I've benched 4.6ghz alot since its needed 1.248v and it hasn't changed.

I still love my "low voltage" C0 :yepp:

I just wish my skills, or motherboard would allow me to get 4.3 stable. I really think its my board, orthos fails not matter what i do at 4.3. Though, i may be doing something wrong, I've tried tons of combinations with timings and volts. I may try the memory timings jacked up to 6-6-6-15 or so, next. :shrug:

its the gigabyte board you have.. i have the GA-EP45-DS3R, i cant get it past 4.1ghz either. ive tried every thing i can think of and from what others have tried to help me with. i have actually had 4 different gigabyte boards.GA-P35-DS3R VERSION 2.0,AND 2.1,GA-EP35C-DS3R,and now my GA-EP45-DS3R. and i cant get over 4.1ghz stable on any of them.4.0ghz is the most i can get and not worry about it.
plus i have a CO stepping so that might hold me back too.

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