**Official e8400/e8500 Retail OC Thread

[AriciU]

Did you mount the second fan to pull or push? 4C is a great result!

[BluePilot]

Just did my first overclock ever. It was really fun.

I am stable with my q807a067 e8500 at 510fsb/4330Mhz. Vcore= 1.26

Passed 1 hour of occt.

Beginners luck I guess

I got this speeds with a thermalright ultra-120 and 2 x Noctua NF-P12-1300 in push/pull configuration. Antec 1200 (all fans on maximum).

Temperatures Everst: Idle: 28c-31c OCCT: 58c-62c Room: 23c

[janolle]

I too noticed a big difference in temps between two E8400 chips. The bad Q817 one was cool but didn't like to overclock, did 1.3xvcore with load temps around 55c. The better overclocking Q815 gets to 60C on 1.18vcore.
I've checked and remounted my Xigmatec 1284 a couple times now, still the same difference.
Another thing I noticed was a big difference in vDroop, though Load line calibration on the P5Q nullifies it with both chips. The vDroop on the Q815 is alot higher.

[AriciU]

I too noticed a big difference in temps between two E8400 chips. The bad Q817 one was cool but didn't like to overclock, did 1.3xvcore with load temps around 55c. The better overclocking Q815 gets to 60C on 1.18vcore.
I've checked and remounted my Xigmatec 1284 a couple times now, still the same difference.
Another thing I noticed was a big difference in vDroop, though Load line calibration on the P5Q nullifies it with both chips. The vDroop on the Q815 is alot higher.

Yup. My previous Q817 E8400 (bad ocer) had like 15C lower temps then this E8500. Even when pushed at 1.42v it still had like 65C full load. I don't even want to imagine what this E8500 would get at 1.42v. I think around 80C-85C.

[AriciU]

Zipties FTW!

Fans are setup Push/Pull. 3C average drop (from 72C to 69C) but, my maximum temp while priming for 11 hours with only one fan reached as high as 79C (pic is above in this thread, realtemp Maximum temperature). Now it won't go over 70C so i'm happy with the improvements.

[AriciU]

Hmm. This is weird. Check the VID reported by CoreTemp 0.99 compared to the ones of CoreTemp 0.99.1 and Real Temp.

1.0750v VID would explain the high temperatures i'm getting with 1.32v. 1.32v on 1.0750 VID is like running ~1.45v on a regular 1.1875-1.2v VID E8500. You might want to check your VID with 0.99 also zfactor

CoreTemp 0.99:




CoreTemp 0.99.1:

[genec57]

I am having a (I think) stability problem that is different from what I have seen in the past.

It has happened at OCs of 4.0, 4.2, and 4.4 ghz with my E8500. At all three OCs I have tested OCCT and Everest stable but my machine will then, at some point, shut down and reboot at random times. It happens under load and idle.

Is this an artifact of high FSB settings? I never had this happen with my Q6700 at FSB of 360 and 380 whereas I am now using FSB of 424-464. Or is this a hardware issue? I have used three different motherboards with similar results (P5K deluxe, P5Q premium, and now Maximus II Formula. Other components as listed in sig.

Enlightenment please.

[AriciU]

Try running Memtest for Windows, or regular memtest and your current OC'ed settings and see if the memory throws any errors. Altough OCCT should catch memory errors pretty quickly. That FSB is not high by the way, it's ok.

If memtest throws no errors then you could maybe try to increase the NB voltage a bit and see if it helps.

[zfactor]

but i thought that 99.1 was much more accurate with 45nm chips?? but yeah with version .99 mine reads 1.075 also..what worries me is my core 0 temps, at idle they are most of the time near 50c... usually 5-10deg higher than core 1

[zfactor]

Zipties FTW!

Fans are setup Push/Pull. 3C average drop (from 72C to 69C) but, my maximum temp while priming for 11 hours with only one fan reached as high as 79C (pic is above in this thread, realtemp Maximum temperature). Now it won't go over 70C so i'm happy with the improvements.

how did you get the xig mounted that way i cant mount it anyway but facing upwards id much rather face it out the back though. did you cut the nb sink or the 1283 at all?? mine will not site that way without sitting on top of the nb heatsink then it cant be tightened down

[AriciU]

It sits right above the NB heatsink and i could tighten it no problems using the my old thermalright bolt-thru kit. I didn't cut anything. How did you mount yours anyway? Pushpins or what did you use?

Asking because apparently, the thermalright boltthru kit produces bad temps because the heatsink is not making proper contact with the CPU. Check here -> http://www.clunk.org.uk/forums/user-...pu-cooler.html

[zfactor]

i used the xigmatek bolt through kit they sent me for it wow then i dont get it mine will literally sit over the end of the nb heatsink.. mine is blowing upwards but i have another fan right above it so there is the nb fan, heatsink fan, heatsink, another heatsink fan, then case fan maybe 1.4" over the second heatsink fan. you have the red scorpion i wonder if there is a size difference between them i have the regular one

think that would lower my temps any???

[genec57]

Try running Memtest for Windows, or regular memtest and your current OC'ed settings and see if the memory throws any errors. Altough OCCT should catch memory errors pretty quickly. That FSB is not high by the way, it's ok.

If memtest throws no errors then you could maybe try to increase the NB voltage a bit and see if it helps.

Thanks for the response. Memtest is clean.
I will try a bit more NB.
I wonder if it could be a failling GPU??

[AriciU]

Mine sits above the NB heatsink also. I could screw it in though. I think the difference lies in the mounting kits since you use Xigmatek's.

[zfactor]

do you think id have better temps that way ?? maybe i can trim off a bit off the xig i hate to trim the nb in case i need to warranty it

[AriciU]

You would definately have better temps with the heatsink mounted like i'm using it. I remember having my TRU mounted facing upwards and it sucked bad. Fan pushed air coming from the hot NB heatsink. What happens if you try to use force when you screw it in? The lower fin should bend a little and rest above the NB sink... it's not like it's made out of steel.

[zfactor]

yeah im thinking maybe ill bend the whole side in a slightly upwards fashion so all of the are still lined up just facing up some... im gonna try it now

[janolle]

Yup. My previous Q817 E8400 (bad ocer) had like 15C lower temps then this E8500. Even when pushed at 1.42v it still had like 65C full load. I don't even want to imagine what this E8500 would get at 1.42v. I think around 80C-85C.

I wonder if it has something to do with the low vid chips being able to draw more juice with a smaller vcore setting. That would mean reaching a larger watt/vcore rating thus heating it more. Someone who knows better will probably call me silly, but it fits my logic.

[AriciU]

Yeah, of course. My 1.075 VID e8500 can run at stock freq. using 1.075v. That around 0.1v less then what an older ~1.18-1.2 VID e8500 runs at. So using 1.32v on this low VID chip is the same as using ~1.45v on an older, high vid, wolfdale. That surely explains the higher temperatures.

[zfactor]

WOWOWOWOWOW by mounting the 1283 sideways i dropped almost 10c on load and down to 36-37 idle but core 0 still read 10c higher at idle and about 5c higher under load this way my temps now are right at 60-62 with orthos running and typing this... (core o still higher lol) and this is without the second fan yet. only problem is i had to pull my nb fan off as it does not fit between the 1283 and the nb sink now.. so that sucks. ill look for a really skinny one i can stuff in there..

what about the xig putting pressure on the nb sink though will this make the nb sink not sit flush now??

[zfactor]

orthos now run 0 still test 8 still 64/61 temp wise adding second fan later when i pick up some bendable spring wire.

the way im doing it is that the xig has 2 small holes in the fins towards the middle if you look. these are on the top and bottom im going to make 2 metal brackets like the one that come with the nb sink. they sell a "spring" wire if you can find it where you are. im going to put 4 small rubber washers on the fan with double sided tape so it does sit on the metal fins then slide over the metal clips im going to make similar to the nb sink

also once my temps hit 64 or 65 they are the same on both cores. so should i ignore the 10c higher reading at idle of core 1?? if so this is a great chip. i rebooted and running at 4.2 w/ 1.32x v now on pass 0 test 10 so far and its still stable so im crossing my fingers

ill post pics if this passes im not sure it will but i can cross my fingers lol temps did not go up at all from 1.31 under load they are still within 1c of before it just sits steady at 65c now excpet in between the tests then it drops a bit and back up to 64/65c on both cores at 4.2.. nice

im also running with c1e enabled.. not sure how big of a different this makes or not

so which do i believe core temp .99 or 99.1, .99 says my vid is 1.075 and core temp .99.1 says 1.1875???

[AriciU]

Nice improvements man. So my bad temps are caused by using the Thermalright bolt thru kit. I will have to file those four little things so the damn things makes contact properly. 10C drop here i come

You are using this:




I am using this. So heatsink is not making proper contact with the CPU because of those damn things.

[zfactor]

well for some reason temps have settled out higher. i turned off orthos for now to check idle temps and they are now resting at 5c higher than they were before at idle??? i dont like this cooler imo

[zfactor]

Nice improvements man. So my bad temps are caused by using the Thermalright bolt thru kit. I will have to file those four little things so the damn things makes contact properly. 10C drop here i come

You are using this:




I am using this. So heatsink is not making proper contact with the CPU because of those damn things.

mine has those nubs to they come through the board also on mine should i shave them off?? they are just not so high on the xig bolt through.. .

still a 5c drop overall is not to bad idle and load.. looks like thats what its settled on.. maybe ill try better tim tomm running as5 now. i have mx2, shin and diamong here but i tried them all and the as5 gave me the best reported results but that was with the sink the other way. all the rest showed higher temps than the as5 did by at least 1c or more with the mx2 believe it or not almost 3-4c higher yesterday than the as5 was

[AriciU]

well for some reason temps have settled out higher. i turned off orthos for now to check idle temps and they are now resting at 5c higher than they were before at idle??? i dont like this cooler imo

Load temps are all that count man. Of course you first got lower temps at idle... you just turned on the PC, CPU was cool. Then you loaded it up and of course it couldn't drop to the same temp anymore.