**Official e8400/e8500 Retail OC Thread

[g1raffe]

Yup, 15 years. It lasted me a total of 8 days First day benches at 1.65v and then 1.48v 24/7 @ 4300.

I think you just got very unlucky.

[AriciU]

Yeah, i know, i'm very unlucky with things like these. I waited for a RMA on my Asus for about 2 weeks, got tired of waiting, said screw it and got this nice DFI, re-did the wiring and everything, used the pc for like 5 hours or so and next day cpu was dead Now it's another 2-3 weeks waiting time while stuck on this POS P4 2.8 /w 512 ram.

[emoners]

i seem to have noticed something OCing my wolf...i can push the clocks high at low VCore but i have to pump up my NB (~1.6v) & VDIMM (~2.23-2.27v). did you guys notice this too? or i am just unlucky with my chip

[Mav451]

i seem to have noticed something OCing my wolf...i can push the clocks high at low VCore but i have to pump up my NB (~1.6v) & VDIMM (~2.23-2.27v). did you guys notice this too? or i am just unlucky with my chip

You have a DFI? Well, I basically left NB at stock, and I'm doing just fine. vDIMM has to be that high though, since the board undervolts like crazy (2.23 >> 2.16 at load). I'm thinking you could probably drop your NB volts to stock and still OC just as well.

[Brian y.]

e8400 SLAPL q746A pack date 1/15/08

OCCT stable on 500x8 (4ghz) @ 1.312v

can't get it to boot at 4.1 no matter which multiplier, haven't messed with anything but cpu and ram voltage

temps are 42c idle / 63c load. think i have myself a good chip overall 4ghz isn't as high as some but it's at a decent voltage and temp at least.

i can't figure out what to mess with on my bloodiron to get it to boot past 4.0 though

My E8400 has done very well on my Blood Iron(God I love DFI's BIOS) It is good up to 4400MHz on air w/ what appears to be a FSB Wall but once I put it under DICE I was able to hit 5388MHz w/ it.

1.74v on a wolfy works wonders


If you set your

SB 1.05v to 1.15
SBCore/CPU PLL to 1.75
NB Core to 1.61
CPU VTT1.4~1.5v

you should be able to go over 4GHz.

[laragirl83]

Yup, 15 years. It lasted me a total of 8 days First day benches at 1.65v and then 1.48v 24/7 @ 4300.

..... I think u just made the point here.

[stephen23]

My 8200
Q745

[stephen23]

but what's wrong with coretemp?
it is very weird that my full load temp is 38 degrees
but idle is 35 and almost 10 degress different on those 2 cores.

[TEDY]

ariciu you gonna rma proc?

[karateo]

CPU VTT1.4~1.5v

you should be able to go over 4GHz.

way too much
here VTT@1.13 for E8400@4050

[ztop]

My 8200
Q745

fpo\batc?
q745 and:::??

[Damien]

way too much
here VTT@1.13 for E8400@4050

not with this board, lowest i think is 1.3

also still no boot...i have to be doing something wrong haha.

[bonzo_catalin]

ariciu you gonna rma proc?

Yes , he does . But it is very upset because it will take at least 10 days to change it . Maybe he will get a better one

[Damien]

must have been a bios issue, because after updating to the latest on dfi's site, i'm now happily running OCCT on this:

1.312v on load

[eshati]

I am thinking of buying a E8400, any good stepping you have to propose?

[Shoty]

must have been a bios issue, because after updating to the latest on dfi's site, i'm now happily running OCCT on this:

1.312v on load

please settings bios

[dropglock]

I think mine just degraded. What use to be stable 1 hours OCCT:
1.35 vCore
1.9 vDimm
1.350 VTT FSB Voltage
1.425 NB Voltage
1.6 SB I/O Power
1.05 SB Core Power
failed OCCT in 30 minutes now.

I am gonna try stressing with higher volts in certain areas and see if it fails again.
1.375 VTT FSB Voltage
1.15 SB Core Power
1.7 I/O Power.

PS: I never went above 1.425 vCore while testing. All I want is a good stable 4005/4008 ghz 24/7 usage since I am new to ocing and did not want to risk anything.

[rge]

Does your FSB VTT need to be that high?

I have not read anyone degrading below 1.4...and plenty people priming long runs at 1.39 and below without issue.

Only ones between 1.4 and 1.44 had confounding issues, like running with high FSB 600, priming with 545 and ? corresponding high FSB VTT or without, and one Greek poster that degraded at 1.41...but turns out in another post he had benched with 1.825v bios few days prior.

But, if you are seeing degradation and not variability could it be your high FSB VTT and not vcore? Isnt 1.15 normal? I have my FSB at 1.15v. Edit..I think 1.10 is recommended for 45nm, where 1.20 recommended for 65nm. list of degradation post 1246.

[ArCElM]

Due to all the unknown issues I decided to drop my clocks and voltage to 4.1Ghz, which is acceptable, it does 4.1 on 1.32v Load, nothing special but its solid, gone just over 6 hours prime stable so far, which is PLENTY stable for me.

[dropglock]

Does your FSB VTT need to be that high?

I have not read anyone degrading below 1.4...and plenty people priming long runs at 1.39 and below without issue.

Only ones between 1.4 and 1.44 had confounding issues, like running with high FSB 600, priming with 545 and ? corresponding high FSB VTT or without, and one Greek poster that degraded at 1.41...but turns out in another post he had benched with 1.825v bios few days prior.

But, if you are seeing degradation and not variability could it be your high FSB VTT and not vcore? Isnt 1.15 normal? I have my FSB at 1.15v. Edit..I think 1.10 is recommended for 45nm, where 1.20 recommended for 65nm. list of degradation post 1246.

Well currently I raised 3 settings in the bios. Here is what I raised:
1.375 VTT FSB Voltage
1.15 SB Core Power
1.7 I/O Power.
and now it is 30 min stable for now. I still have 30 min to go to get 1 hour stable OCCT so we'll see. If this is stable I will lower the sb power and I/O power and stress again. But like I said my previous settings was stable 1 hour OCCT, then it failed in 30 min when I stressed again. I'll even stress with the settings that OCCT failed in 30 minutes again just to make sure.

EDIT: Just failed OCCT with 29 minutes to go at:
1.375 VTT FSB Voltage
1.15 SB Core Power
1.7 I/O Power.

[mngdew]

The first one with 12/29/07 pack date was slowly dying. It did 4ghz with 1.36V, but it cannot break 4ghz barrier no matter how much voltage I fed it (I gave it up to 1.45V). When it did run at 4ghz, it only reached 27C idle / 55C load.
So, I got another one with 1/10/08 pack date. There were also 1/29/08 ones, but I went with the other. This one is doing 4.05ghz (9x450mhz) with 1.31V, but idle temperature is around 47C and max load is around 63C. This setting is stable for 6 hours of Prime95 and 2 hours of OCCP (is it true that 2 hours of OCCP equals 6 hours of Prime95?)

There was a nice deal on Kingston HyperX PC8500 2x1Gb at the Frys', and 4 sticks of them are running at 450mhz with 4-4-4-12 timing nicely.

[BustaH]

That makes about as much sense as an ashtray on a motorbike.

He has speed step enabled, multiply His fsb by 9. by the look of the time He super pi'd Hes got 9x470.

[Viss]

Not a clue about degration because ive not got these chips for that long. Gave mine between 1.80v and 1.95 for hours yesterday though benching on LN2. Prime on air stil runs fine at same vcore as before...

[rge]

Well currently I raised 3 settings in the bios. Here is what I raised:
1.375 VTT FSB Voltage
1.15 SB Core Power
1.7 I/O Power.
and now it is 30 min stable for now. I still have 30 min to go to get 1 hour stable OCCT so we'll see. If this is stable I will lower the sb power and I/O power and stress again. But like I said my previous settings was stable 1 hour OCCT, then it failed in 30 min when I stressed again. I'll even stress with the settings that OCCT failed in 30 minutes again just to make sure.

EDIT: Just failed OCCT with 29 minutes to go at:
1.375 VTT FSB Voltage
1.15 SB Core Power
1.7 I/O Power.

I guess what I meant was you are still in VID range of cpu vcore, but 25% above suggested VTT FSB. And ? if high VTT FSB is just as bad as high vcore, and ? of stress testing with high VTT FSB is especially bad.

Could you raise vcore a little, and drop VTT FSB to 1.25 or 1.2 and get stable. And then see if you get any further degradation.

[PhilDoc]

Well currently I raised 3 settings in the bios. Here is what I raised:
1.375 VTT FSB Voltage
1.15 SB Core Power
1.7 I/O Power.
and now it is 30 min stable for now. I still have 30 min to go to get 1 hour stable OCCT so we'll see. If this is stable I will lower the sb power and I/O power and stress again. But like I said my previous settings was stable 1 hour OCCT, then it failed in 30 min when I stressed again. I'll even stress with the settings that OCCT failed in 30 minutes again just to make sure.

EDIT: Just failed OCCT with 29 minutes to go at:
1.375 VTT FSB Voltage
1.15 SB Core Power
1.7 I/O Power.

Maybe I missed something, but are you sure you have degradation. There's not much difference between getting an hour vs 30min. Maybe the ambient is a little higher this time. I can run Orthos for an hour at 4.3G at 1.35v vcore, but if I have the heater running in the room, it fails after 30min. Turn off the heater and let the room cool down and its back to an hour.