E8400 Overclock

[LeeWB3]

Overclocking my E8400. The C2Q/C2D Temperature guide is GREAT.

Calibrated speedfan as per the instructions. Slowly upped speed and then voltage as everyone recommends. Currently running seemingly stable at 3.84GHz with very good fan/case (though not top of the line).

Question: Guide states that core voltage may drop "at least 0.025V". Max voltage under load is said to be 1.365. I've got mine set in bios to 1.3875. CPUZ reports 1.368V at idle and 1.344V under full load. Is this dangerously high or not?

 

[RJR]

First, do you have an E0 or C0 E8400?

Max you should set your vcore to is 1.3625 v (intel spec) to be safe but that's up to you.

What are you using for temp monitoring / cpu stressing?

 

[LeeWB3]

I've got an E0. This is kinda what I'm asking. The temp guide suggests that 1.3625v is "max load". I'm below that under load and only very slightly over it idle. Even though I'm WAY over it in the bios.

I'm using Prime95 with both cores small FFT for stress, speedfan (fully calibrated per guide) for temperature and CPUZ to determine voltage, etc.

 

[LeeWB3]

Oh, BTW, I'm getting 60/65 for temp (again, calibrated).

 

[RJR]

It's up to you how you work up your OC, but I would suggest starting to lower your vcore now. The E0's are known for requiring fewer volts. I'm running mine at 1.28v Bios, 1.26 Cpuz (idle and load) @ 4.00 Ghz (500X8).

Other than that everything looks GREAT!!!!

 

[LeeWB3]

OK, I'm hearing you say that it's much higher than you'd feel comfortable with. Guess I'll lower my overclock to make it run steady at a lower voltage. I wan't having problems at a lower voltage even on Prime95 under Vista but Win 7 is completely unstable overclocked without the extra voltage. Thanks for the input.

 

[LeeWB3]

BTW, I guess you're getting a better overclock using an 8x multiplier than the default 9x? Is that common?

 

[RJR]

I've got an Asus P35 board that doesn't mind higher FSB numbers so I worked it up both ways, first with the 9 multi and then with the 8. I found with mine that it took a little more voltage with the 9 multi so I stuck with the 8 and only had to bump up the NB one notch. Everyones is different though, I see lots of people running 4.0 Ghz with the 9 multi (9X445) at or below the vcore I'm using. So, it all depends on your system as to what it wants.

I would try a few things though to bring down your vcore a little, it's on the border now. It may run for ten years that way or not, I've always tried to run at the lowest vcore and heat I could.

Either way good luck.

 

[OMGiTzzFATAL]

Your Vcore is way to high for 3.8ghz

I've got mine at 4ghz with 1.200Vcore under load and thats fully stable. Make sure your other volatges like NB volatge and GTL referances voltages are set correctly (they will help with stablility) i have my NB at 1.24V and GTL1 is 0.650. and GTL2 is 0.635.

Hope that helps. =] Good luck.