3.2GHz max for new e6600?

If stable only at that vcore, then yes, you got a bad chip batch.
I'm quiet sure nothing can be done since it is stable. If it wasn't stable, we could discuss other tweakings...
You can always try to flash your bios...

Look at my sig for my vcore. For the safe part, 3GHz at 1.35 vcore is a good deal. For performance (depends on your needs), 3.2GHz is tempting

jonny is your CPU, but I think you are forcing it too much. 1.58V, TAT over 70C is more than that chip should have. Just my opinion, tho.

You know what, you're much better off with a 3,0ghz long term stable overclock, then with a crazy 4,0ghz stable for the first 4 weeks and then degrading.

That's actually what I did. I'm at 3,0 ghz for my E6600 and not even sweating. My VCore is at 1.32V (I put it straight there, it might even be stable at stock VCore) and I never had any crach, even under TAT for 6 straight hours at a 100% load (amongst other torture test).

What do you do with your PC? Gaming? OK' so what is it worth to get 130 instead of 115fps in your favorite game? Video encoding? Ouch, you'll have to wait a whole 3 minutes more to encode your home video, a big 26 instead of 23 minutes.

I just want to show that the difference isn't so bad. OCing can sometime be like trying to get the performances of a Corvette out of a Hoda Civic. You're gonna get to it but it'll cost you close to the same price, or more, at the end. Consider that you need a least a 70$ heat sink (300$ or more for water cooling), maybe 200$ more if the first cpu doesn't stand the abuse of time, some case fan, and the rest and you'll get close to the price of the model you're trying to reach. You'll save a few $, but is it worth the headache?

My judgement, OC is good as long as it's not counter productive. Just be happy to have a 3,0GHZ cpu for a few hundred $ less (and cut the VCore to still use it in 2 years time). No offence I hope

TAT load, I meant, reading temps with TAT, while benching with Orthos. I think TAT will get it to the 83°C :-)
Didn't try it, since TAT is ridiculous. None of my programs will be ever as TAT
And on all my use, I never reached 60°C on the cores, even while encoding. Yes, even Orthos is more demanding than any other app you'll use

OCing a C2D above 3GHz doesnt mean anything most of the time.People want to do it just ....to do it.

What PSU are you using? What are your RAM specs? There's a ton of things that could be causing problems, post some detailed specs and I'll try to help.

Thanks for reply all (exept one, you know who you are ) !

Reason I wanted higher overclock is that I have 3-4 SQL applications running at same time and my old computer froze for long time when making some queries etc. Now with 3ghz this freezes for just few secs. Of course there might be something else hindering performance. But CPU usage tops for both cores. Would like that freezing to go away

I have antec P150 as case with that included PSU, should be enough with my 8800gts card?. Have 2G memory G-skill kit 5-5-5-15 800mhz. And I'm cooling CPU with scythe ninja with noctua nf-s12-1200 fan.

edit:forgot question about room temp it's only 22-24C

Well, your power supply is your most obvious problem. There is simply no way that 430W will cut it in your system if you want any kind of overclock. Right now you have yours completely maxxed out, which is going to shorten its lifespan considerably and put all of your other components at risk. Get something that's at least 600W. Check the PSU 101 sticky for good brands/models, anything tier 1 or 2 will do just fine. Once you have it installed, go ahead and up your MCH +0.1V, VRam +0.1 or 0.2V, disable EIST, and try to bump your FSB higher. You'll likely be much more successful. But whatever you do, get a real PSU before you fry your system!

up the ich & vmch in the bios this should get you past 3.2

There's likely not enough juice left in his PSU. Upping these voltages at this point would likely increase instability in his system. New PSU first, then try upping voltages.

Good, that PSU should be more than enough for now and in the future. Now, your FSB will only go to 1.4V? What speed are you running your memory at when your CPU is at 3.2? Can you manually select your RAM speed on that board, or do you have to adjust a multiplier? Do NOT raise your Vcore any higher, that voltage should be more than sufficient to 3.8Ghz and beyond... In fact, go ahead and drop it to 1.45. I have a feeling your RAM is where the problem is at.

Is this your RAM?
http://www.newegg.com/Product/Prod [...] 6820231098