TPower I45 + E8400

hfidgen

hfidgen

hfidgen

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16 Jan 2010
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5
Hiya,

I've been reading up the stickies in the forum and found this thread on search, but I've still got a couple of questions if anyone can help? :P

First off - What is the "normal" overclock you'd expect from the E8400? I've
heard 4GHz is pretty easy to get?

Secondly.. I get the idea that you bump up the FSB and test, but the thing which worries me is stepping up the voltage. Is there any way of calculating how much extra voltage to apply or is it all guess work? And IF you under/over volt the chip, what are the consequences?

Is it just a case of step the voltage up tiny bit by tiny bit until it's stable? But can you fry something?

Not too many questions I hope ;)
 
Hi,

For that cpu 4ghz is easy to get usually @ around the 1.3 - 1.4vcore region, depending on mobo and cpu. Kinda take that range i said as a guide to aim at,

There is no set way to judge what a cpu will need vcore wise, as each setup is different, hence why people slowly raise the voltages untill it becomes stable, there really is'nt to much to worry about, it won't damage your cpu, if u don' put enough vcore in, it simple won't boot up properly, and will ask you to set up the values again.

Undervolting won't harm your cpu either, but means you would have to take off intel speedstep to get the best out of it, and also means you having to tweak a lot of the other settings too, if u click on the link in my sig, you will notice my overclock i run 24/7 is actully undervolted from the stock 1.2vcore it uses if i let the mobo do it.

Now onto your last question, aslong as you have aftermarket cooling on your cpu, no matter the cost of it, you will be fine upto 1.4vcore, but id be highly surprised if you would need that much for 4ghz.

One last thing when people are saying a certain vcore, we are meaning what cpu-z is showing when the cpu is being stressed, and not what is entered in the bios, For example some people on some mobo's have to enter 1.5v in the bios for it to get 1.4v understress, the under stress vcore is the most important one.
 
That makes sense... Guess it's just time for me to try :P

The cooler is an Artic Freezer 7 Pro (or whichever order the words go in :P) and it runs the cpu at 22C currently so should give me plenty of slack.
 
You'll be fine with that cooler, used to use one myself.

Looks like ur going by the overal cpu temp, and not the core temps, in that case, keep the temp when its loaded up below 72.4°C, and all will be fine.

But yeh its all about testing now, what id suggest is to get a clock ur after stable, and then you can fine tune it better, good luck with the testing and playing, if you get stuck we are allways here to try and help where we can.

Most important thing, have fun.
 
The Board and CPU are a great combination and your cooler should be fine for 3.7-3.8 but to go higher and keep the temps down you will need reasonable air circulation though your case too. Also your RAM may hold you back so let us know what you have.
In case you've not used it, you can use the BIOS save feature (you can save up to 9) to save each stable setting so you have something to go back to.

I did post in that thread and have the same motherboard/CPU although now at 3.95 @76c max ( :( Never did reach 4Ghz stable) with some setting changes.
Post back if you need any more info.
 
If your E8400 is E0 stepping, and your board's bios is up to date, you should manage 4Ghz with 1.4v

I'm on 1.375v for my E8500.
 
Mine runs at 3.9 and 4GHZ on a EO stepping at 1.3v using 8500 OCZ ram quite happily and have not really pushed it any further until I get a better heatsink, but it will do more.
 
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