**Official e8400/e8500 Retail OC Thread

[maxwolfie]

leave it at 4.3, 1.4v

[afireinside]

Got a Q801A I believe E8400 OEM from newegg today. Trying to get measly 4ghz stable with my TRUE + yate. Core 1 idles 4-5C lower than core 0, which leads me to believe I have a bad mount. Orthos they load the same, 61-62c. 1.35v BIOS on my maximus formula and orthos makes it a whole 4 minutes 15 seconds. I'm not very happy. Going to be taking the watercooling dive for the nth time it seems

[trt740]

Got a Q801A I believe E8400 OEM from newegg today. Trying to get measly 4ghz stable with my TRUE + yate. Core 1 idles 4-5C lower than core 0, which leads me to believe I have a bad mount. Orthos they load the same, 61-62c. 1.35v BIOS on my maximus formula and orthos makes it a whole 4 minutes 15 seconds. I'm not very happy. Going to be taking the watercooling dive for the nth time it seems

no almost all wolfdales have wacky sensors. They just don't work right with core temps.. I've had 4 total now and none work right unless you use realtemps

http://www.xtremesystems.org/forums/...d.php?t=179044. intel has address this and said the tjunction senors are only for throttling and the sensors do seem to be right underload in core temps.

but from experience it doesn't look right either sometimes the cores are only 6 to 10 degrees hotter under load than the socket temps, and thats for sure not right. In the past they were alway about 15 degrees higher. That was also true with my yorkfield quad and it is 45nm. It's sensors were all with in a degree after I used it for a few days and it worked fine with core temps and looked right. Now real temps was about 10 degrees cooler? Something is wrong with real temps aswell. It appears close but not exactly right. Plus everyone has always said the posted temps on intels web site are for the T junction but intels say thats not so it's for the surface of the chip or the heatshield. They also say that the 105 Tjunction temps are not correct but don't say what is. I think intel made crappy senors in thw wolfies or atleast one that don't work with core temps.

[trt740]

I think you better go into Maximus formula thread, I think your Bios settings are more the culprit then the CPU... SuperPI 1mb doesn't put much stress on a CPU...

hows yor maximus compare with your P5k fsb wise on these chips.

[afireinside]

no almost all wolfdales have wacky sensors. They just don't work right with core temps.. I've had 4 total now and none work right unless you use realtemps

http://www.xtremesystems.org/forums/...d.php?t=179044. intel has address this and said the tjunction senors are only for throttling and the sensors do seem to be right underload in core temps.

but from experience it doesn't look right either sometimes the cores are only 6 to 10 degrees hotter under load than the socket temps, and thats for sure not right. In the past they were alway about 15 degrees higher. That was also true with my yorkfield quad and it is 45nm. It's sensors were all with in a degree after I used it for a few days and it worked fine with core temps and looked right. Now real temps was about 10 degrees cooler? Something is wrong with real temps aswell. It appears close but not exactly right. Plus everyone has always said the posted temps on intels web site are for the T junction but intels say thats not so it's for the surface of the chip or the heatshield. They also say that the 105 Tjunction temps are not correct but don't say what is. I think intel made crappy senors in thw wolfies or atleast one that don't work with core temps.

Interesting. I heard a lot don't work, but I figured that meant they didn't read at all Anyway I'm 32 minutes orthos stable at 4ghz 1.375v! Quit orthos to play 2 maps of cod4 and now I'm pushin for more.

[MosIncredible]

Seeing some of you guys clocks & voltage makes me want to throw my E8400 at the wall.

[sfdmalex]

Seeing some of you guys clocks & voltage makes me want to throw my E8400 at the wall.

My suggestion run OCCT and look at what the graphs tell you. HOnestly it transformed my experiance.

You can really monitor whats going on and narrow down problems.

You'll know how good your PSU is, how droopy your board gets, when it gets droopy and how it relates to voltages, when you get spikes.....

[-JJ-]

Hi there,

Since there is no dedicated topic to E8200, I though I could my question here. Just recently switched from E6750 to E8200 and now I am trying to find stable settings for my E8200 (batch: Q744...) to run @4ghz for 24/7/385 use with the following setup:

MOBO: Asus P5K-E WIFI-AP (v.1006 bios)
CPU: C2D E8200 (batch: Q744...) @4,00ghz (1,353v vcore) cooled by TT Big Typhoon
RAM: 2x1GB Crucial Ballistix DDR2 @1200Mhz (PC2-6400, D9GMH chips)
HDD: Western Digital Caviar RE2 500GB x 2 (INTEL RAID)
VGA: CLUB 3D 8800GTS (G92) (800/1950/2200) cooled by Accelaro S1
SOUND: Creative SOUND BLASTER X-Fi Xtreme Music
PSU: Zalman ZM850-HP

So with the above setup and following bios settings I was able to run Orthos for 7+ hours with no crashes (see the screen right above):

FSB strap to north bridge: 333MHz
FSB Freq.: 501
PCIE Freq.: 105
DRAM Freq.: DDR2-1200MHz
DRAM Command Rate: 2N
DRAM Timing Control: AUTO
DRAM Static Read Control: Disable
Transaction Booster: Enabled (2)

CPU Voltage – 1,425v (1,392v real)
CPU PLL Voltage – 1,50v
FSB Termination Voltage - 1,10v
DRAM Voltage – 2,20v
NB Voltage – 1,40v
SB Voltage – 1,20v
Clock Over-Charging Voltage – AUTO
Load-Line Calibration – Enabled
CPU GTL Voltage Reference – AUTO
NB GTL Voltage Reference – 0,61x
CPU Spread Spectrum – DISABLE
PCIE Spread Spectrum – DISABLE

CPU Ratio: 08.0
CIE Support: DISABLE
Max CPUID Value Limit: DISABLE
Vanderpool Technology: DISABLE
CPU TM Function: DISABLE
Execute Disable Bit: DISABLE

Anything to improve in those above mentioned bios settings, except for lowering CPU Voltage?

So since the CPU voltage was pretty high at 1,425v in bios and with vdrop of 0,033, 1,392v real. With the same settings intact, except for lower CPU voltage (1,3850v in bios/1,1352v real), I cannot get it Orthos stable, however OCCT (AUTO mix) runs with no crashes up to CPU voltage - 1,3850v in bios / 1,352v real (see the second screen right above). I was thinking that maybe I am running the RAM to high, but then again nothing changed if I set it 1000mhz (still orthos stable with voltage @1,392v and anything less gets orthos-unstable).

BTW, if CPU GTL is set to any value but AUTO, I get either BSOD or 5second Orthos crash . Same thing NB GTL – it only works if its set to 0,61x.

Is it safe to leave the CPU running @1,425v (1,392v real) or even @ 1,3850v in bios / 1,352v real ?

[Leeghoofd]

hows yor maximus compare with your P5k fsb wise on these chips.

If I may say P5K Dlx is way easier to setup... voltages are way better and are spot on and almost no ripples under testing... Dunno why but my Maximus overvolts : CPU PLL, NB, RAM... it undervolts FSB termination voltage... Max FSB was same for both boards, my Q6600 topping at 475FSB Stable, both Qx9650 around 465-470ish level...E8400 did 500FSB but I sold that CPU...

X38 performs slightly better on the ram though nothing to talk about daily... and I still cannot get 400FSB/1000mhz ram to work with the Gskill PC8000PQ set... works fab on the P5K DLX...

[joe.denice]

I guess I am happy with my e8500 at 4ghz then with only 1.275 volts.

[afireinside]

Is it safe to leave the CPU running @1,425v (1,392v real) or even @ 1,3850v in bios / 1,352v real ?

Not a clue. I don't think anyone knows for sure. Has anyone actually LOST a CPU entirely yet? I'm ramming 1.45v down mine on air cooling :X maximus formula, not sure how bad the droop is.

[Hughyhunter]

I have been @ 1.375 bios 1.352 cpuid for over a month and a half now... no problems at all. I cant see there being any problems under 1.45v. I am going to work on 1900fsb but every combination I've tried so far give me BSOD... anybody else experience this?

[x2s3w4]

Not a clue. I don't think anyone knows for sure. Has anyone actually LOST a CPU entirely yet? I'm ramming 1.45v down mine on air cooling :X maximus formula, not sure how bad the droop is.

Hey afireinside, how long have you been running at that vcore? Some have had degradation and some haven't. Seems to appear between 2-4 weeks running 24/7 from everything I've read.

[F0rr3sTT]

Actually, the latest I've seen on degradation is here

http://www.xtremesystems.org/forums/...179965&page=10

they seem to have come to the conclusion that those reports of degradation are probably based mostly on PSU & motherboard

[afireinside]

Hey afireinside, how long have you been running at that vcore? Some have had degradation and some haven't. Seems to appear between 2-4 weeks running 24/7 from everything I've read.

Uh.. few hours 4185 wasn't stable (awful chip) so I knocked it back to 4100 1.4375v bios.

[joe.denice]

Here is my chip:


Stability: 48Hours Small FFTs orthos still running!

CPU: e8500
OC: 4000 MHz
Stepping: C0
Week: Q740
Code: A518
Vcore 1.2875

Cooling: Air
Cooling brand/Model Thermalright Ultra Extreme 120 (Lapped)
Motherboard Asus Rampage Formula
Bios Version 0215
Operating System Vista x64

Ram brand: Crucial Ballistix
Ram rated speed: 8500
Ram actual speed: 1000
Latency: 5-5-5-18-2t

CPU Z Validation:

http://valid.x86-secret.com/show_oc.php?id=339421

[ThatGuy16]

I can't break 4.34Ghz to save my life. I don't know if its the board or chip. i can get it stable at 4.3, but i can't even get into windows anything above that . I'm stable at 4.0 with only 1.26v, i was thinking with water cooling i could at least hit 4.5Ghz for some bench runs.


Are these good temps for my setup, Apogee GTX, MCR320 rad..

At 4.0Ghz 1.26v. I get 21c idle and 37c load (CPU temp "Tcase?"). The cores read 48-50 on load (im still thinking the core readings are wrong.)

At stock clocks/volts. The temperature only goes up 1c on load (21c "cpu").. I'm always paranoid, i think all of the air is out of the system.

[afireinside]

Try booting the fsb needed for 4.34+ with a lower multi. Might just be the CPU fsb walling

[Hughyhunter]

I can't break 4.34Ghz to save my life. I don't know if its the board or chip. i can get it stable at 4.3, but i can't even get into windows anything above that . I'm stable at 4.0 with only 1.26v, i was thinking with water cooling i could at least hit 4.5Ghz for some bench runs.


Are these good temps for my setup, Apogee GTX, MCR320 rad..

At 4.0Ghz 1.26v. I get 21c idle and 37c load (CPU temp "Tcase?"). The cores read 48-50 on load (im still thinking the core readings are wrong.)

At stock clocks/volts. The temperature only goes up 1c on load (21c "cpu").. I'm always paranoid, i think all of the air is out of the system.

Those temps are excellent. I was having a hard time booting at 1900fsb or 4.275ghz too. I eventually got it to boot at 4.5ghz or 2000mhz fsb with 1.6 volts. TEmps were high but it passed 3dmark06. Temps were in the 60's on load and 40's idle. That's with really good air cooling.
Try giving that sucker a ton of volts and it will boot!

[unclewebb]

... but from experience it doesn't look right either sometimes the cores are only 6 to 10 degrees hotter under load than the socket temps, and thats for sure not right.

Most socket temps on most motherboards are far from 100% accurate, 100% of the time. That's the whole reason that Intel went to on chip temperature sensors. You also can't compare the difference between socket and core temps when you are using two different processor families like 45nm and 65nm. The 45nm chips are much more compact and could be transferring more heat directly to your socket sensor so the smaller delta might be caused by that. You would need to do some more testing to find out for sure.

Something is wrong with real temps as well.

Just a minute here. Now you're getting personal!

I wrote RealTemp because all of the other temperature monitoring software was out to lunch for my E8400. When RealTemp is properly calibrated, it can track the core temperature of my E8400 within a degree or two from 10C to 100C. It's hard to get any more accurate than that when the DTS sensors were never designed to give out accurate idle data and when the data coming out is only integer values.

Here's a good comparison of temperature software when using my E8400:
http://www.xtremesystems.org/forums/...&postcount=573

I'm presently running a Q6600 and have noticed that one of the four sensors is reporting about 4C lower at idle so I'm planning to add individual calibration for each core. I wasn't planning to include that option for the dual cores since they typically track each other pretty closely but after reading some posts here it looks like I'll be adding that feature to the dual cores as well. The correct TjMax combined with this feature can really help improve the accuracy of your reported core temperatures.

[Hughyhunter]

can someone give me a link to download orthos. I have orthos sp2004 and have been using prime. I notice all use beta version. Where do I get beta? Looked all over net cant find.

Thanks

[Dimek]

can someone give me a link to download orthos. I have orthos sp2004 and have been using prime. I notice all use beta version. Where do I get beta? Looked all over net cant find.

Thanks

Catch

[-JJ-]

can someone give me a link to download orthos. I have orthos sp2004 and have been using prime. I notice all use beta version. Where do I get beta? Looked all over net cant find.

Thanks

http://sp2004.fre3.com/beta/beta2.htm

[IcemaN22]

Has someone tested Q750A219 ? cant find any results.

[CrazyNutz]

Actually, the latest I've seen on degradation is here

http://www.xtremesystems.org/forums/...179965&page=10

they seem to have come to the conclusion that those reports of degradation are probably based mostly on PSU & motherboard

Don't be too hasty, that has not actually been confirmed, still there are a lot
of people that cannot reach there initial stable clocks without adding more voltage, including me.