Problems Overclock an e8400 in asus p5kpl/1600

Check out this thread (it's a sticky)

http://www.tomshardware.com/forum/240001-29-howto-overc...

What have you done to overclock it?

i have tried a lot of thing

1.First with Asus profiles only works 15% or less.
2.Setting fsb 400mhz and multiplier 9x ,no black screen, but windows doesn,t start(i have tried with a lot of voltage values and no stable)
3. Setting higher fsb and lower multiplier(my last try, sycronice memorys and fsb) , black screen, have to turn off PC.

Asus p5kpl /1600=rubbish ....

Did you raise the NB voltage? Also, try setting memory to very low speed.

Are temperatures OK at 3.45?

On my Asus Rampage Formula the highest the Asus overclock profiles will let me go is 3.33Ghz. If you're wanting to get to 3.6 you'll have to manually set your values and not use the Asus profiles.

I would say 1.325v Core voltage, 400fsb, 9x multiplier. You should be able to run a lower voltage than that though I would think

I used to have a Q6600 (D0) with my P5KPL-CM (same chipset) and I could get it to a stable 20% OC just by using the auto-profile, but to manually overclock it at 3ghz I needed to up the voltage just a little (but well within specified safe parameters) to achieve stability, then after a couple of weeks it just went "poof" on me (the PC just shut down while I was reading a newssite.)
I still don't know what happened, but my warranty got me a new P5KPL-CM and I bought a new PSU just to be sure, from then on I just left it on a 20% OC using the auto-profile, never had a problem since (I kept it for 7 months, I went i7 in July.)

The moral of the story is: although it may have been the PSU that killed my mobo, the P5KPL's just aren't good overclockers.

Still, 3.45ghz is enough for gaming, unless you have 2 4870X2's or something, in which case you probably have the money to buy a better mobo, if you were into professional applications needing a lot of processing power you'd have known you'd be better off with a quadcore, so chill and enjoy your gaming with your 3.45ghz.