I7 920 ... C0- D0- what's that

a D0 stepping i7 will overclock a hell of a lot further.

THanks Jay , can you tell me if on your CPu box what model did you see baych number .. I just want to know witch one I have. I know on he model or version it's written SLBCH... did that can confrim which one I have.

Thanks for the answer I just find the information ... on intel website they said: Stepping is like revision/improvement of the same product during it's life cycle.

1GHz is a bit optimistic - C0 920s could consistently hit 3.6 on air, while 4.0-4.2 seems to be the number for the D0 (and even that may be optimistic, though we'll have to see). I'd be curious to see what the D0 965s can hit too - I know my C0 965 is good for 4GHz on air (temp limited), and would be good for 4.3-4.4GHz on water (voltage limited).

First, I would bet that the 965 will be released as a D0 at some point, or just discontinued. There's no reason to continue to produce outdated steppings.

As for that 4.63GHz - it's amazing, but I would not take it as typical by any means. I would still say from what I've seen so far that 4.0-4.2 seems to be the average (though obviously, if you get lucky, you could go well beyond that).

Hi,
For me at 3.9 on air 1.325v. It's ok . I don't want to set record speed with that cpu anyway.
I just use this cpu at 3.66 and a bfg gtx295 and I can play all the games I want at really high setting. So, the the other 300-500 mghz will be more then extra and i think i don't really need it.
For work I have some application who used the all threads to process information, meaning 8 thread start at the same time to process information. When i do work at home and the same workload the office,it took at least 50%-65% less time at home. When I show the result to one of my colleague the only thing he can say his: Gimme the list of the part you have in that monster, then he present that to my boss and they already orders the same build then I have for the 6 desktops we used. They only remove the gtx295 for lower the price and add 4870 1 gig.

Yeah i did not want to push it any more because of heat. I'm positive it would go higher, I may still fiddle with the other voltages to see if I can not bring that 1.3v down and reduce the heat a little. Even with the D0 cpu's it going to be the luck of the draw when it comes to OCing. That's how it always is. Plus I get all confused when people list there temps because of all the monitoring apps out there and some read differently. I stick with good ol OCCT. (3.0.1)

So how do you tell them apart based on model number? Newegg has the model number as BX80601920 but does not list the stepping

http://www.newegg.com/Product/Product.aspx?Item=N82E16819115202&Tpk=core%20i7%20920

I saw the D0 listed elsewhere under this same model number but don't know if the C0 versus D0 have different model numbers. Just curious as to how to guarantee a D0 as I'm going to start putting together an i7 system in the next few weeks and going to have my first crack at Oc-ing.

^
You will probably have better luck with retailers that circulate their stock faster, like Newegg. They are only making D0's now and so when the C0 stock is gone it will be only D0's. So your best bet is to go to a retailer that has since pushed out all of their C0 chips. I originally had a C0 but had a bad memory controller and RMA'ed it. I got a D0 back from Neweggs. That was about 3 weeks ago. I would assume they are not shipping D0 chips.

Well i guess i am lucky, but with my c0 and v8 i hit 4.0 easy 4.2 somewhat unstable.

I am looking at adding a TRUE 120 Extreme. The new 1366 version seems to come with one Thermalright 1600 RPM fan (Fluid Dynamic bearings) already. As I would like to do push/pull, would I add another 1600 RPM fan, or just get a same brand 2000 RPM one? In the latter case, which one would be used for pull versus push? Higher speed for pull or for push?
If 2000 RPM would be too noisy, I could just do 2x1600. Any comments on one versus 2 fans on this cooler?

http://www.crazypc.com/products/ultra-120-1366-50985.html

I can find reviews on the Titan but nowhere to buy. I thought the TRUE was one of the preferred air coolers out there. Not correct? Low temps, low noise.

I would put the faster fan as the pull. If you have it as the push the slower fan will cause resistance.