Q17: Does the first generation of 7LP target higher frequency clocks than 14LPP?
GP: Definitely. It is a big performance boost - we quoted around 40%. I don't know how that exactly will translate into frequency, but I would guess that it should be able to get up in the 5GHz range, I would expect.
https://www.anandtech.com/show/12438/the-future-of-silicon-an-exclusive-interview-with-dr-gary-patton-cto-of-globalfoundries