Sandy Bridge-E should hit C2 stepping after launch

[onethreehill]

We knew that Intel's Sandy Bridge-E chips were big and complicated to make, but what we didn't expect was that Intel was going to continuously keep running into problems. The current C1 stepping is apparently having problems with VT-d, not a major issue for most consumers' maybe, but it's a huge problem when it comes to Xeon chips and as such Intel is working on the C2 stepping to fix this "errata".

The only good news here for Intel, if you look at that way, is that its current Extreme Edition CPU's don't support VT-d, neither does the Sandy Bridge K-SKU CPU's, so as far as the consumer platform is concerned it looks like there won't be any further delays, but the initial batch should be C1 stepping rather than C2. The C1 stepping should be in production by now, or by the latest by next week, although we don't know when Intel will kick off production of the C2 stepping, but it's very possible it won't be until next year as qualification samples of the C2 stepping isn't expected until the very end of the year......

http://vr-zone.com/articles/sandy-br...ch/13677.html#

Update: Intel Core i7-3960X and i7-3930K CPUs Transitioning to C2 stepping in January

As previously reported, Intel's first wave of Sandy Bridge-E processors have VT-d (Intel Virtualization Technology for Directed I/O) disabled due to an errata in the C1 stepping. That issue couldn't be resolved in time for the launch but it's getting fixed with the C2 stepping which is set to start rolling out to customers on January 20th, 2012 (samples have already been delivered).

The CPUs moving to the C2 stepping are the hexa-core Core i7-3960X (3.3 GHz) and Core i7-3930K (3.2 GHz). Beside the fixed VT-d, the C2 chips will feature new S-spec and MM numbers so a BIOS update for current motherboards will likely be required......

http://www.techpowerup.com/156625/In...n-January.html