Some unreleased Comet Lake-S processors have been revealed, and by none other than Intel. Referenced in an Intel Software Advantage Program document, the CPUs are part of a broader list of Intel processors qualifying for the Crysis Remastered Game Bundle. As far as we can tell, the list contains three unreleased Comet Lake-S processors, the Core i5-10390F, Core i5-10505 and the Core i9-10900KS.
In the case of the Core i5-10390F, its F suffix designates that it is a processor without integrated graphics. Currently, Intel sells F versions of Core i3, Core i5, Core i7 and Core i9 Comet Lake-S processors, including the Core i7-10700F and Core i9-10900F. Oddly, while there is a Core i5-10300H, Intel released the 10300 as a Core i3 processor.
Presumably, the Core i5-10505 is a higher SKU of the Core i5-10500, as the Core i7-1068NG7 is to the Core i7-1065G7. However, it is unclear what a 505 SKU would offer over the 500.
Finally, the Core i9-10900KS would be an unlocked (K) special edition (S) CPU, like the Core i9-9900KS. The Intel Software Advantage Program document does not disclose any information about the Core i9-10900KS either, although we imagine that it is a higher binned version of the Core i9-10900K. If that is the case, then the Core i9-10900KS may offer higher boost clock speeds.
It is unclear when, or if Intel plans to release these Comet Lake-S processors. It would seem odd for the company to do so at this stage though, seeing as Rocket Lake-S chips are on the horizon. Similarly, the Core i9-10900KS would have more cores than the Core i9-11900K also, which may take the shine off Intel's new Rocket Lake chip.
Source(s)
Intel Software Advantage Program via Tom's Hardware & Wccftech, Image source - RockPaperShotgun