Intel Core i5-10400 offers a lot more multi-threading performance thanks to HT

Some leaked benchmarks popped up that compare the performance of the upcoming Intel Core i5-10400 "Comet Lake-S" processor with the Core i5-9400F. VideoCardz offers an overview and notes the Core i5-10400 is about 4.4 percent to 8.8 percent faster in single-threaded CPU benchmarking tools. Multi-threaded performance on the other hand is up to 45 percent higher in Cinebench R20.

Single-threaded performance is higher thanks to higher clock frequency, whereas multi-threading is a lot faster thanks to the inclusion of Hyper-Threading.

A Comet Lake-S model (10400) has hyperthreading enabled, unlike its predecessor. This means that the 10400 has 12 threads while 9400(F) has 6 threads. They do share the same base clock of 2.9 GHz, but the newer model features a 4.3 GHz boost clock (meaning there’s a 200 MHz upgrade over the last generation).