Need help on OC E8400 P5Q premium

Hi Wingedemoon,

Read these 2 stickies:

OC Guide: http://www.tomshardware.com/forum/ [...] uals-guide

Temp Guide: http://www.tomshardware.com/forum/ [...] ture-guide

Get speed fan and calibrate it so you know your Tcase temp. Unfortunately the only published max temp is the Tcase (core temperature readings are for tjunction). The e8400 Tcase max temps are 74c (e0 stepping) 71c (c0 stepping).

As for your settings. It looks like you have an awfully high vcore for that clock speed. With my e0 stepping e8400 I was able to hit 3.8ghz on stock vcore and was at 1.2something. I didn't have to start bumping vcore till I went for 4.0ghz (444x9) and even at that OC it was a very minor voltage bump. But your high temps are being caused by that vcore which is fast approaching Intel's specification of 1.3625v.

Something else to consider is that your video card puts out a TON of heat, and if you don't have good case cooling (at least 2 or 3 120mm intake/exhaust fans) your interior is probably roasting and causing the cpu to run hotter than it needs to.

So for starters, what stepping do you have? Try dropping your vcore to 1.265 and see if you are stable in prime small fft for at least 4 hours. If not, bump it 1 increment at a time until you get that kind of stability.

you have a dud chip...

you have to, thats simply way to much voltage for that chip,

I get 3.85 ghz STABLE for 24 hours in prime95 on a quad core... at 1.25 volts

your volts are simply too high for that speed, to stabilize change NB voltage to 1.5, at minimum and see if that increases stability

also set your...

nvm I found a thread that seems pretty useful... and its a New-B so its good to know there are a couple non noobs

http://www.tomshardware.com/forum/ [...] -4ghz-move

Thanks for all the info guys.

As far as my Stepping I think I have a C0...

And I am guessing my chip is a dud too...

What should I do??? Will it makes a different if I change the NB and SB Voltage? and read something about VCC... wonder what it does?

Thanks again for the help!

You have to remember that only 50% of the e8400s hit 4GHz at 1.4v or less. You are at 3.8GHz which is still plenty fast. Can you try adjusting your fan to max? If you want 4GHz at 1.2v, you are gonna need an e8600. Those are Intel's highest bin and im seeing people hit 4.5GHz at 1.3v to 1.4v Hope this helps.

Also, I dont know if it is my fan too... everything stock setting i get like 60sC when running p95. And it should be in Max fan speed as I can adjust it from the outside of my PC and it is 100% on the nob with 2220rpm speed.

My e8400 (e0) hit 444x9 at 1.25v vcore and that's all I changed

If you are hitting high 40s idle and low 60s loaded at stock settings, you probably should try reseating your heatsink. But before you do that, try running the prime 95 at stock settings with the side panel off and a fan blowing on your open comp--that is if you haven't already don this. That will tell you if your case cooling is causing you problems or if you need to reseat the heatsink.

This is so confusing!!!! I would love to pay someone to get it done for me sometime!!! lol

I really hope is the heatsink, and the messed up part is... I am such a noob and I cant even pull my heatsink out!!! Grrrrr

The BIOS' to these P5Qs are a little quirky...I find it most stable when things are on "auto." Also try reseatting your heatsink. Does it pass 3.8 with lower vcore?

BTW, I used 1 whole AS 5 Thermal Compound. I really think that helps! $8 well spent!

yeah lol you probably have AS5 all over your mobo now