What is the diference between a cc0 and a cd0?

[Mictlan]

I've heard this for quite some time in this board and decided to check my CPU. I just found that in has 2 rows of numbers (I think this is the processor number and the serial number, if not please tell me what do they mean) but I didn't found any marking that follows that kind of information. Where do I look for it?

And besides that this means that cd0 is newer than cc0, is there any other difference?

I have a PIII 550E if it helps in something.

[DocClock aka MadClocker]

Yes it is,(cDO) a newer stepping, and maybe will run a little faster, but so far not much difference that I know of between the cCO and the cDO, except that the DO will only come out in 866mhz and above, and it might be a bit more stable. Should see 1.2g DO's eventualy, or they might save that speed for their next smaller process. I'm not sure if they have switched to their new process with the DO chips, maybe somebody here has more info on the subject.

[Mr B]

I believe the biggest difference between the two is the cC0 chips run the 0.18 micron core archetecture, and the cD0 chips are running the new 0.13 micron cores.

I believe.....not 100% sure, but to the best of my knowledge.

Someone correct me if I am wrong on this, please.

Mr B

[Mictlan]

So all 0.18 micron processors (a.k.a Coppermite) are cC0?

[jmsandrsn]

cC0 and cDo both use the 0.18 micron architecture. cD0 will have a core voltage of 1.75V. According to Intel roadmaps, the 0.18 micron process on PIII's will not go above 1 GHZ which is where it has been for the last year or more. Apparently, they will wait for the 0.13 micron process before taking the PIII any higher. Even then, it sounds like Intel is going to concentreate on getting the 0.13 micron PIII's into notebooks and not putting as high of a priority on desktops because they want to switch everyone over to the the P4 for desktops.