Like its bigger brother, it also supports 44 PCIe lanes.
We can get to hear about the Skylake-X and Kaby Lake-X from Intel on 30 May and it falls in line with earlier reports of Intel launching its products at PC Gaming Show.
The i9-7900X takes things up one more notch at 10 cores and 20 threads, 44 PCIe lanes, the same 4x RAM setup and 13.75 of L3 cache. It is also believed to be making its way later in August this year, though the rest of the i9 models are expected to be coming out in June.
For the Kaby Lake-X processors, the better of the two will be the Core i7-7740K and is based on the latest 14nm+ process node.
The first of these products is the hexacore i9-7800X, packing 8.25 MB of L3 cache and quad DDR4-2666 RAM. The question of whether these would be the answer to AMD's recently released Ryzen series of processors is still a subjective matter, however.
The 7900X will reportedly feature a 3.3 GHz base clock, with boost clocks of both 4.3 and 4.5 GHz depending on whether you're using Turbo 2.0 or 3.0. The Core i9-7800X is going to feature 6 cores, 12 threads and will carry a total of 8.25 MB of L3 cache. For the last six years, all the way back to the 3960X, Intel has offered 2-2.5MB of L3 cache per CPU core in the HEDT family. Increasing cache sizes without negatively impacting cache latency is a significant undertaking; Intel would have had to do a fundamental respin on Skylake to make this change.
Indeed, system vendors would probably have a much easier time moving systems with these types of chips if they could easily communicate that the chips inside are "better" than the ones with the more standard Core i7 chips. Unless Intel plans to substantially slash prices, that would actually be a worse deal than at present.
A forum member at AnandTech posted what is purported to be an internal slide outlining a new crop of Core i9 processors. Ryzen 7 doesn't now offer a 32-lane solution either, though there's speculation that the company's rumored HEDT competitive solution will, when and if it's released. The higher-end Core i7-7740K has two threads per core enabled, while the lower end i7-7640K has just one thread per core enabled.
Finally, it's not clear why Intel would even bother releasing Core i7 CPUs with these specs. The four-core Core i7-7640K comes with 6Mb of cache.