Details gleaned from SiSoftware Sandra suggest that the 10-core Skylake-X will run at significantly higher speeds (4GHz base, 4.5 GHz Turbo Boost) than what was theorized by previous reports (3.30GHz base, 4.30GHz Turbo Boost). Other specs include 14,080KB (13.75 MB) of shared L3 cache, 1MB L2 cache per core (for a total of 10MB), as well as a 175W TDP. Word is: "While initial reports pegged this CPU at as running at clock speeds of 3.30 GHz base and with 4.30 GHz Turbo Boost, it would seem Intel's release silicon will leverage much higher stock speeds, with the reported values on this SiSoft report being a staggering 4.0 GHz base, and 4.5 GHz Turbo Boost. These are extremely high clock speeds for a ten-core part, but all the other details about the Core i9 7900X check out: there are 14,080 KB (13.75 MB) of shared L3 cache, 1 MB L2 cache per core (for a total of 10 MB), as well as a 175 W TDP."