Intel’s special edition Core i9 9900KS has lower IPC than the 9900K

It looks like the new Intel Core i9 9900KS has lower IPC performance than the existing i9 9900K. So, clock-for-clock the older chip will deliver better raw CPU pace than the expensive special edition processor aiming to become the world’s best CPU for gaming. Intel’s new Core i9 9900KS sure gets around. Even before it’s been officially released Czech retailers have been shipping them out, letting redditors nail 5.2GHz overclocks, and websites have snaffled early samples. Tom’s Hardware has got itself what it calls a ‘pre-production’ model and has been putting it through its paces. We’re still waiting to receive our own piece of final silicon, but what Paul Alcorn has discovered over at Tom’s in the meantime is rather interesting. The reason Alcorn has delved into the relative instructions per clock of the 9900K and 9900KS is because the new Core i9 processor is using a new stepping of the 14nm++ (Stepping 13) which includes hardware mitigations for some of the raft of security flaws found in Intel silicon over the last few years.
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