C1 Stepping

[CyberFed]

What exactly is this, i hear about it all the time with p4's, anyone have a good link for info on it, pros, cons ect..

Thanks

 

[arklab]

I'll try to give you a quick answer, but keep looking for more specific info. on this.

When a chip maker (Intel or AMD) makes a "small" change or upgrade to a given chip design, they usually introduce (name) it with a new "steping" and also a new sSpec.

Lets look at the Pentium 4 1.8A CPU's;

Those with sSpecs of SL62R, SL62P, SL63X, SL66Q, SL68Q all have a core stepping of B0, a default core voltage of 1.5v, and of 154 posts in the CPU database an Average overclocked speed of 2551 Mhz (using everything from stock Intel heatsink-fan to active refrigeration.
The max OC speed is 3113.

The just sighted SL6LA (by RiStaR plucked from a new Dell - see his posts on this forum) has the new core stepping of C1, and a default core voltage of 1.54v (which is true of all C1's).

So what's the big deal?
With only minor BIOS tweeks and air cooling he is getting 3500 stable!

Mind, these are ALL just 1.8A P4's, the cheepest CPU's Intel currently offers.

Also, the new 3.06G P4 with HyperThreading tech is also a C1!!!
As you might guess, everyone is hoping that lesser speed C1's might also be able to use HT.
THIS HAS NOT YET BEEN SHOWN, AND MAY NEVER BE DONE.

But we can all hope .... (and drool)

 

[ozzie_no_good]

So only the P4 with this ------>SL6LA <---------- number are C1 steppings ????


Can a P4 on 400Mhz have an C1 stepping if so its got to have the same number ???

Just asking going to buy a new one so I will know where I got to look for




Greetz and thnx ozzie

 

[doormat]

No, see this site for info on which sSpecs are B0 or C1 steppings.

http://processorfinder.intel.com/scripts/default.asp

Different speeds have different sSpecs.

 

[batboy]

If the default voltage is 1.525v, then it's a C1 stepping. The B0 stepping is 1.5v. All 2.5, 2.6, 2.66, 2.8, and 3.06 CPUs will be C1 stepping. The rest might be B0 or C1.

 

[ElroyCarbon]

Great job on the explanation guys.

 

[Molybdym]

I absolutely cannot wait for the mass of 1.8 c1's. That sounds like a fantastic player.

 

[CyberFed]

yeah i wanna see if i can find one, where can they be found??

 

[Clockers]

I have a sl6d8 code but it's not listed on the Intel website. Is this a C1 cpu?

Version #: C16847-001 Pack Date: 08/28/2002