**Official e8400/e8500 Retail OC Thread

[justageek95]

Just got my x38-ds4 and e8400 in, downloading 45 vista updates ... i tried to run core temp but it says it need s a digitaly assigned driver, so maybe these updates will fix it?

it looks like bios is reporting the temp right for me, it has 24-26*c depending on what i set the fan speed to

i'll post some results up in a bit

EDIT: i need help, all the temp monitoring programs still say they need a signed driver, what do i need to get?!

This should work but I haven't tested it as I don't have Vista personally.
start>run>cmd (command prompt)
then type "bcdedit /set loadoptions DISABLE_INTEGRITY_CHECKS"
If that doesn't work then this one might:
Bcdedit.exe /set nointegritychecks ON

Let me know if this works.

[kitfit1]

Is it true that the max FSBv u may apply for these chips is 1.15v? cause I have my FSBv @ 1.40 now, so it worries me abit oO

I don't think that "we" would regard it as the max. But through all the testing i have done, 1.15VTT works best for stability. By that i mean, in this thread and loads of other threads on the net we have had hundreds of peeps showing us hours and hours of small FFT Prime runs. That is easy to do at very silly clocks with these procs, and proves nothing. All, or nearly all, fall down of course because they fail large FFt's within seconds, which is why nearly nobody has posted large FFT runs. Getting high stable clocks out of these procs is all about GTL % and VTT as well as Vcore of course. These procs to me are all about proper clocking, you have to think about what you are doing, not just dial in a clock and forget it, because that won't work. The easy clocking days of C2D are over, if you want good clocks now, you have to really think about what you are doing and it's consequences, and then act on it.

[sofarfrome]

After reading some posts about the potential for CPU degredation with higher vcore I am going to run the system at 1.360vcore for a few weeks doing the WCG thing and see if I can maintain stability after by testing with P95 again.

This is my 8+ hr P95 stability run. I will see if I can repeat it after a few weeks.

[JoeBar]

After a week with my 8400 @ 4.0ghz, 1.39v, i haven't seen any degradation as of yet.

[Spyrus]

1)I tried 1.33V for 4050 but it was no go
2)So i kept my 1.3V and lower to 3950. Prime still no go.
3)I did not went over 1.45V. And this voltage for 4.5GHz was only for one hour benching session.
4) I have the Maximus formula. I kept these settings in 24/7 and in benching
PLL was minimum to 1.5 but mobo overvolts to 1.6
FSB Termination to 1.2 but mobo undervolts to 1.1 because of Wolfdale. With
my E6750 previously 1.2 was 1.2 no undervolting. That means that Formula
has considered the right FSBTermination for Wofdales.
5)Since first day i was running at 1.3@4050 and after the benching session i had
the degrade.

Conclusion for me:all wolfdales that needs low voltage at start will degrade and reach those that are not good overclockers (e.g. 1.45V@4GHz) even at low voltages.Even if i have not raised the vcore to 1.45 i would still have the degrade in my opinion.

To sum up in order to bench at 4500@1.45V
CPU PLL: 1.50 ~ 1.6 monitor
FSBv/ VTT: 1.20 ~ 1.12 monitor
CPU GTL: 0.63x
NB GTL: 0.67x

Sorry for misunderstanding but my cpu is ok for now
Forgotten to loosen memory timings after bench sessions

[ztop]

someone have tested a e8400 with asus p5k vanilla? wich bios do you have used?

[HaTaX]

I *had* an Asus P5K Vanilla, and was running bios 0704 with my E8400. The board worked fine for a few days, then I started getting errors in windows and eventually after a normal windows reboot, the board refused to post and it never came back. If you have one I would recommend that you look at the new 0902 bios they recently posted, it says it includes support for new cpus.

[ThatGuy16]

Heres my 24/7 clocks

set to 1.28v in bios, i thought that wouldn't be anywere near enough

I only ran orthos for 2hours, good enough for me.

The "cpu" temp seems to be correct, its dead on with bios and appears to fluctuate correctly

Batch# Q745A567
Pack Date: 1/04/08

My memory timings are slow, at stock 5-5-5-18. Set to 2.1v @ 445mhz (DDR2 890)

[maxwolfie]

After a week with my 8400 @ 4.0ghz, 1.39v, i haven't seen any degradation as of yet.

Ditto, same vcore but I'm running 4.1ghz

[Master Farkha]

CPU: E8400
Batch: Q746A509
Vid 1.115
Pack Date: 1/11/08

4105 MHZ (9x456) @ 1.376V on air

[ixtapalapaquetl]

I was getting tired of my ridiculous temps (80+ on load) so this weekend I worked up the nerve to pull off my IHS. I have tons of experience popping open AMD chips, but learned that Intel chips are "soldered" on (and by soldered, I mean they use an adhesive thermal paste that melts at or under 100C). Did some research and found a logical removal technique involving a stove and pan. However, as I was cutting through the black silicone, the IHS just popped off on its own accord (scaring the $hit out of me in the process). Upon inspection, the die appeared intact despite the fact that I didn't even apply any heat.

However, when I put the delidded CPU back in my mobo, I was unable to get sufficient pressure between the cpu and my HS to get it to post (scaring the $hit out of me once again - thought for sure it was a goner). Tonight I finally found a copper shim that has allowed me to get enough pressure to at least boot up. My temperatures are predictably awful (die -> TIM -> copper shim -> TIM -> HS), but I am relieved to know that the chip is indeed alive.

Early next week, I will be getting some water cooling gear in. Included in that gear will be a spring mountable backplate (that didn't come out right, but you know what I mean). At that point, I will be able to properly mount my HS and will be able to provide an apples to apples temperature comparison before and after IHS removal. I will then post some water cooled results sometime the following week.

So I guess the moral of this story is that a) the IHS can be successfully removed, but b) I don't have any real comparative info as of yet. Feel free to ask me if you have questions regardng IHS removal.

Source one: Methylphenidate's IHS removal technique: http://www.xtremesystems.org/forums/...0&postcount=39 (entire thread is good reading). Also consider CrazyXP1700's technique: http://www.xtremesystems.org/forums/...0&postcount=51

Source two: freecableguy's technique for removing retention clamp to allow proper contact after IHS removal: http://www.thetechrepository.com/showthread.php?t=23

Source three: closeup of Wolfdale without IHS - note no SMD's to worry about, so removal is more or less worry free: http://en.expreview.com/?p=142

[Bail_w]

can you take some picture of the IHS being removed.

[maxwolfie]

can you take some picture of the IHS being removed.

How can he do that when he's already done it?

[.OCX]

Trying to push 12 Hours Orthos Stable without overvolting during burn-in. This is 5 hours and counting with the temps looking right in line for 12 hour stable.
[BIOS Setting ~ Hardware Monitor]

Ratio CMOS Setting : 9
FSB Frequency : 435
FSB Strap to North Bridge : 400
PCI-E Frequency: 100
DRAM Frequency: DDR2- 1159
DRAM Command Rate : 2T
DRAM Timing Control: Manual 
CAS# Latency : 5
RAS# to CAS# Delay :5 
RAS# Precharge : 5
RAS# ActivateTime :15
11-46-10-5 

DRAM Static Read Control: DISABLED
Ai Clock Twister : STRONG
Transaction Booster : ENABLED
BOOST: 0

CPU Voltage : 1.26250v ~ 1.248v
CPU PLL Voltage : 1.5 ~ 1.632v
-Many users reporting 1.5 stable.

North Bridge Voltage :1.59 ~ 1.616v
-Fails Orthos 4mins at 1.57v Bios.

DRAM Voltage : 2.26 ~ 2.384v

FSB Termination Voltage : 1.22 ~ 1.168v
-Failed Orthos after 1.1 hour at 1.20v

South Bridge Voltage : 1.1 ~ 1.136v
Loadline Calibration : ENABLED
CPU GTL Reference : .61x
North Bridge GTL Reference : .63x

DDR2 Channel A REF Voltage : AUTO ~ 1.184
DDR2 Channel B REF Voltage : AUTO ~ 1.184
DDR2 Controller REF Voltage : DDR2

SB 1.5V Voltage : 1.55v ~ 1.616

[maxwolfie]

Would you guys think that it's silly to run 1.45v 24/7?

[AriciU]

Up to you really. I'm currently Orthosing at 1.5v for about 2 hours. Will use this daily i guess as coretemp doesn't exceed 73C and Smartguardian (monitors from diode) stays at 65C.

[maxwolfie]

Up to you really. I'm currently Orthosing at 1.5v for about 2 hours. Will use this daily i guess as coretemp doesn't exceed 73C and Smartguardian (monitors from diode) stays at 65C.

Though Intel states 1.45v is "termination voltage" - Regardless of temps etc. That's why I'm asking

[Xvys]

I would not go above 1.365v for 24/7 use. That is the recommended maximum vCore that Intel advises, although their technical documents show 1.45v as the absolute maximum cpu voltage for the E8000.

Intel also recommends surprisingly low PLL and FSB Term voltages also, which many current motherboards do not even allow settings that low (despite claiming to be 45nm "ready"). But many of us happily exceed these voltages treating our Wolfdales just like we did the 65nm Conroes. I hope they hold up in the long run?

My setup is solid as a rock at 4.005GHz (445 x 9) with 1.365v. I have my ram at 5:6 (558 MHz) @ 2.15v; Cpu PLL@ 1.4v; NB @ 1.25v; FSB Term @ 1.20v, with a Performance Value of 6.

I did put 1.60v through the cpu to reach 4.6GHz, but I wouldn't recommend going that high except for short period testing...but to each their own!

[maxwolfie]

Righto, I'll leave it at 1.39v @ 4.1 for now then

[Bail_w]

How can he do that when he's already done it?

Ya, sorry i meant can you take a picture of the IHS and CPU afterward.

[LagunaX]

Retail e8400 Q746A381
Air Cooling: Thermalright Ultra Extreme

4050mhz 1.365v set in bios/1.344v actual (Foxconn Mars)
Dual orthos blend stable >2 hrs (still testing)
Idle: 42c/30c
Load: 60c/53c

[sunny7day]

Hi everybody.
What is the lowest VID avaliable for retail E8400?

[rastaseb]

i saw 1.050 one time!

[sunny7day]

Hi everybody.
What is the lowest VID avaliable for retail E8400?

after a little research, seems to be 0.975V!! I want to get one.
But how do I identify this VID by just reading the box of the cpu?

[karateo]

vcore set in bios: 1.36899