Intel Core i9-9900KS Special Edition CPU Review

Overclocking, Thermals & Power

For the last few generations, overclocks have been flirting with the 5GHz mark. Since Intel’s Core i9-9900KS already comes out of the box able to maintain all cores at 5GHz, it almost seems like your job is already done here. We know better though, so let’s give it a little kick and see what else is left under the hood.

We are easily able to boot at 5.1GHz on all cores.

We see a small bump in the Cinebench score.

Temps are pretty manageable at this point with the hottest cores only peaking at 84C.

We push on to 5.2GHz and boot right up first try.

We again get a good jump in the score. Temps are creeping up to the mid 90C range at peak, with an average around 90C.  Voltages are still a very manageable 1.32V at this point.

1.34V gets us a stable 5.3GHz on all cores for non-AVX loads, but won’t quite handle AVX based workloads. We could use this as a daily driver with an AVX offset of 100-200MHz if we wanted to, pending we keep it under a water cooler or very good air cooler.

So far, we’ve seen some really impressive performance from the highly clocked Intel Core i9-9900KS but that raw speed comes at the cost of increased power usage. While overclockers are quite used to this, the average gamer that just wants ultimate gaming performance will need to keep an eye on total system power consumption against their power supply. We are seeing stock full system power usage from a CPU only load hitting 285W from the wall, about 85W more than a stock i9-9900K. Overclocking to 5.2GHz bumps this up about 25W more.

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