**Official e8400/e8500 Retail OC Thread

[Leeghoofd]

.....what.......sarcastic?...well here are screen shots of 22c idle and another on 100% load like i said it wont go over 42c both shots at 4.45ghz if you look at the top of the real temp window

Every thing you said was debunked from the start...because true temp reads 27c idle on the same board and cpu and dosnt go over 49c on 100% 30 min prime 95...so like i said its real temp thats reading it that way....

your new values are more believable and even 32°C idle is still perfect... be realistic if you tell us you got 77° ambient, it's hard to idle at a lower value not ?

Just a tip :don't be agressive in your posts as you will not make many friends with this attitude...

sorry if this info is posted already, but how can I tell from the box what stepping a chip is. I'm picking one up from microcenter and I want to call in and have a sales rep tell me the serial off the box. What serials am I looking for?

Look for anything after Q821XXX and you will be fine... E8600 is for sure EO ; most E8500's too , but with 8400 you need to be carefull

[VOID WARRANTY]

nothing stresses my chip like youtube and xtremesystems. A true stress test. Intel should learn from the best

thats while running prime blend at the same time for 2 hous......more than a few times its been 2 weeks at 4.45ghz and it still hasnt crashed...i deem it stable......i would hate to think im the only one who uses prime 95 to check stability.........any way im going to dump this UD3R for the new lanparty ut p45 thats when were see some real gigahertz.......
below is something i got done working on 3.0ghz with less than a volt that last pick it jumped to 1.008 after i stopped the test the board keeps bouncing between v-core even when its not on load..

[MJR]

looks like I will be in this thread a lot now. I just picked up a CO stepping e8400 for $120 at microcenter. I got tired of the insane volts my current chip takes. I can't wait!!!

[MJR]

thats while running prime blend at the same time for 2 hous......more than a few times its been 2 weeks at 4.45ghz and it still hasnt crashed...i deem it stable......i would hate to think im the only one who uses prime 95 to check stability.........any way im going to dump this UD3R for the new lanparty ut p45 thats when were see some real gigahertz.......
below is something i got done working on 3.0ghz with less than a volt that last pick it jumped to 1.008 after i stopped the test the board keeps bouncing between v-core even when its not on load..

How are your temps the same on load and idle?

[faithful10]

This chip just gets better and better. Intelburn test stable at 4.420 mhz with 1.328 volt (using loadline calibration now). It can prime at lower volt, but again i want it to be burntest stable before it is good for me

[VOID WARRANTY]

How are your temps the same on load and idle?

could be because of how low i set my v-core in the test keeping the heat down its also water cooled thats the only thing i can think of....when its at 4.45.ghz 1.344v..it jumps up to 49c on prime 95....but for the screen shots above i wanted to see low i could set the v-core at its rated speed of 3ghz which was 0.992v and it passed an hour and a 1/2 of prime

[VOID WARRANTY]

This chip just gets better and better. Intelburn test stable at 4.420 mhz with 1.328 volt (using loadline calibration now). It can prime at lower volt, but again i want it to be burntest stable before it is good for me

nice bro... ha ha i think its great how our $170 chips out do most peoples E8600,s makes me feel like i got a bargain...what motherboard do you got

[faithful10]

nice bro... ha ha i think its great how our $170 chips out do most peoples E8600,s makes me feel like i got a bargain...what motherboard do you got

Thanks. I am using a Asus maximus Formula MB with X38 chipset. It is flashed with Rampage bios 0601

[MJR]

Where are you guys finding the EO revision these days?

[co2r]

got a c0. running this OC now. Stable using OCCT, PRime95, but not the Intel Linpack Test.. anything I should do??

[Mav451]

List your system, CPU/Mobo/RAM etc. in your sig. It'll help everyone to know what you're running on.

I'd start by setting your RAM to cas 5 and seeing how well your board responds to NB voltage increases. It does look like you'll be in the 4Ghz 1.3vcore (+/-) crowd, though. It's good company for C0's.

[Tal Bar]

Finally, i find pretty good E8400 after several bad tries. It's Q830B153 Batch with VID 1.1875V. It's working Ortos stable with 450x9 (4050mHz) only on 1.15V, 4.2gHz with Auto 1.18V. Tried also 4.5gHz, but it's need some more voltage. Pushed to 1.34V and stop the Ortos after 2 hours successfully running. Needed also increase CPU VTT to 1.26V and PLL to 1.64V. All that with air cooling Zerotherm Zen120. With good liquid cooling the CPU can be pushed to 5gHz, i hope..

[SPQQKY]

I've got a bad E8400 E0 Q832A378. One of the cores always craps out while the other stays stable. I need 1.34v just to keep both cores running @ 4.05GHz. One core will keep running in P95 @ 4.27GHz with 1.29v while the other errors out. I need 1.43v to keep them both stable. That's terrible compared to other E0 chips.

Edit: also what is the limit for my memory anyway? Its OCZ Reaper HPC 2x1GB DDR2 8500 .. Right now its running at 2.1V, 1770Mhz, fully stable and passes memtest. How much can I go with this memory?

Ummm, didn't anyone else catch this? I really don't think that is the case.......can anyone say "new world record" LOL

[bigwill68]

sorry if this info is posted already, but how can I tell from the box what stepping a chip is. I'm picking one up from microcenter and I want to call in and have a sales rep tell me the serial off the box. What serials am I looking for?

If your picking up E8400 you need to talk the saleman to look for

(S-SPEC:SLB9J) That's the EO Stepping number..If I was you..I
would go in myself and stand at the processor case and look for
the number.I gave above..The pack date on my is 08/07/08
and the Batch#Q820A832 atlease look for batch in the 820's

Best of Luck

[lochabar]

Finished the system in sig a week ago, still tweaking it. So far, I'm noticing this CPU seems to want higher voltages than most EO's. Batch is Q832A161. Got it from neweggs NJ warehouse btw. Can get a 4.5G overclock, but it takes 1.4 vcore and running the FSB up around 500 makes my RAM wonky. Cranked the FSB down a bit to try some tighter timings on the RAM, but noticing the vcore needs to stay a bit high. Right now I'm running 450MHz Bus, x9 multy @ 4.05GHz...which wants a vcore of 1.36. I can pass an hour of OCCT at these settings.

[co2r]

List your system, CPU/Mobo/RAM etc. in your sig. It'll help everyone to know what you're running on.

I'd start by setting your RAM to cas 5 and seeing how well your board responds to NB voltage increases. It does look like you'll be in the 4Ghz 1.3vcore (+/-) crowd, though. It's good company for C0's.

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?

specs:
e8400
biostar tpower i45
gskill 2x2gb ram kit
9800gt 512mb

[MrRevhead]

Wow I just played Day of Defeat: Source for about 2 hours straight, with 1.36v and 4.5ghz on my E8400

Hey Garrett,

Have you done any more stability testing with your CPU? I know a retailer with a Q836A and I am interested to know how they perform

[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

[Mav451]

Yeah same here, though I have a feeling I never had enough NB voltage to begin with (only 1.34v in Windows since February 2008). I also, however, never played a 3D game long enough to really stress test. I played TF2 max maybe 1-2 hours at a time. L4D has me playing 4hrs+ per session, and pulled some Windows file BSODs (which I consider not as serious as the typical IRQ_LESS_THAN_EQUAL ones). A few bumps in my NB voltage, and no more BSODs. But I can't help but wonder if my 2hour OCCT checks are simply not enough (compared to 3D stable).

Hell I could probably drop my vcore back to 1.296vcore, but I'll probably play it safe like an old man and leave it be. Load temps are what, 1C higher b/c of a 2-step bump in BIOS. No biggie.

*actually you know what? Maybe we did experience degradation, and we ing babied our procs with only 1.3vcore. :|

[gurusan]

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.

[Infa]

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

[DMF]

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.

[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.

[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.

[VOID WARRANTY]

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.........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