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As the topic says, I have some problems overclocking my E8400. As it is quite capable of going past FSB 400 (stock 333), and I myself am having trouble keeping my computer running @ FSB 350, which would increase the over-all clockspeed by a mere 150mhz. Here’s the list of my specs:
CPU: e8400
Mobo: MSI p45-neo3
GPU: ATi HD 4870 512mt
PSU: Chieftec 550W
RAM: 4 gigs of kingstons 800mhz 5-5-5-20.
I consider myself quite tech-savvy, and am willing to learn, but I just can’t understand what the problem here is. My computer reboots itself automatically when/before I get to windows, so I doubt it’s the heats. Also have adjusted my voltages back and forth both on my RAM and CPU, but neither helped. Have changed the FSB-RAM-multiplier thingie to keep my RAM freq at the ~same level, with it varying +-50 at tops.
Any ideas/help is appreciated. :)

Can’t check the temps, cause as I said can’t get to windows if overclocked. Can check the non-overclocked temps tho, if that would help. And I’ve got the stock cooler, but should be more than enough to take it to 3.6ghz.

There’s no such bad luck that makes a cpu model that is highly overclockable in over 90% of cases completely non-overclockable. As I said in the op, even the smallest increases in clockspeed make my cpu crash on boot. I think I even tried increasing FSB by 7, which totals to an increase of 63 mhz and still crashed. Also ran some benchmarks, was ~50 degrees tops. Around 35 idle. Don’t understand how an increase in clockspeed can make the idle temp way over 50 degrees from 35 tho, since that would obviously be a requirement for a over-heating-caused-crash on startup, no?

Can’t check the temps, cause as I said can’t get to windows if overclocked. Can check the non-overclocked temps tho, if that would help. And I’ve got the stock cooler, but should be more than enough to take it to 3.6ghz.

Usually theres an option in BIOS ‘PC Health Status’ or similar, that will tell you the various temps. Have you a stock or aftermarket cooler?

I could check the temps from bios I guess, will report back when I can be arsed doing it. But I still doubt an increase of 15 degrees, think it’s more like something I forgot to turn off/on.

I’ve had the cpu since christmas, and I tried to OC it back then without success, but let it go since I didn’t really need to extra processing power.

I thought the FSB on a E8400 was 1333?

Edit also just buy a new cheapish cooler and youll be able to get it to that, when people say on forums that they got it to that on stock usually they mean with high temps and with a very lucky batch.

you said that you’ve changed the ram divider, but to what? is it 1:1?

It’s not the temps. Something is unstable ( you can’t boot windows )…. What I should do when I was you is to clock it back to standards and ( first test if you can run windows on standards, if not hardware is probably broken ) begin overclocking in little phases untill you have reached unstabillity. When you reach unstabillity you know which change made it unstable… Unstabillity in early phases is most of the time due to shortage of voltage. Increase this a little step ( + 0,1 V ) a time and try again.

ps: It’s also possible that other hardware is blocking your cpu’s oc because it reaches it’s limit, check this.. I’m 2 lazy to google your hardware specs : )

If not:

Read the following link and try again :)

http://www.legionhardware.com/document.php?id=717&p=0