According to a leaked roadmap, Intel’s flagship Sandy Bridge E series should appear in the fourth quarter and will feature quad- and six-core processors.
The as yet unnamed quad-core will feature a 3.6GHz clock and 10MB of cache, but it is not entirely unlocked, unlike the six-cores, which might limit overclocking to some extent.
The two six-cores will end up with 3.3GHz and 3.2GHz clocks, as well as 15MB and 12MB of cache respectively. Both will be fully unlocked.
The Sandy Bridge E series will continue to utilize the 32nm production process, but in the 22nm Ivy Bridge will begin to replace the quad-core Sandy parts.
You can check out the slides here.