AMD Ryzen 9 3900X vs. Intel Core i9-9900K: comparison and which processor is better

With the release of the new AMD microprocessors under the Zen 2 architecture, the CPU market has been completely revolutionized, since Lisa Su’s have not only achieved a considerable increase in performance but have included a greater number of cores in its enthusiastic platform. Today we will focus on its faster CPU, the Ryzen 9 3900X, which will be compared against the i9-9900K, which processor is better and more recommended?

And because of the current prices that run through stores and after the presentation of the Ryzen 9 3900X, what AMD offers with this CPU exceeds Intel’s attempt at the same cost. And is that with the i9-9900K, we find an 8-core and 16-wire CPU at a base frequency of 3.6 GHz and a Boost at a 5 GHz core, where the frequency for all cores under load is reduced to 4, 7 GHz.

It has 512 KB of L1 for Data e Instructions, 2 MB of L2, and 16 MB of shared L3, where its memory support is located in DDR4-2666 MHz in dual channel and up to 128 GB of total capacity.

For its part, AMD raises the bet with its Ryzen 9 3900X, which carries 12 cores and 24 wires at a base frequency of 3.8 GHz and a Boost of 4.6 GHz for a core, which will remain stable under load at 4.1 GHz in all cores on average and with active PBO. The size of your caches is another crucial section since you get 768 KB of total L1, 6 MB of total L2, and 64 MB of total L3.

The memory section has also improved in these new Ryzen since now its IMC is capable of supporting 3200 MHz of stock under dual channel and DDR4, which is a small step forward.

One of the key points in the presentation of AMD for Zen 2 was the incredible increase in CPI announced by Lisa Su; specifically, it showed a 15% improvement in this section, comparing the Ryzen 7 2700X against the Ryzen 7 3700X. These data seemed very optimistic, given the huge jump that this implies, so based on certain information that we do not publish, we established a real improvement between 8 and 10% on average.

Between the i9-9900K and 3900X, the difference is set at 6.53% in favor of the AMD processor, so for the first time in more than ten years, AMD once again has the crown of instructions per cycle, placing Your processors in the lead.


These CPUs are included within the desktop platforms as enthusiastic range processors, that is, they are dedicated to multitasking and focused on playing. Until now, AMD had sinned from lack of IPC in its Ryzen, low memory speed, and lower frequency, but with Ryzen 3000 and Zen 2, it has managed to outperform Intel in instructions per cycle, greatly increasing the speed of its memories and give a slight boost to the frequency.

This and the data that AMD presented with Strange Brigade in E3 made us think that, finally, AMD was going to be up to Intel in gaming. Unfortunately, this is not the case, since as we see, the FPS in Strange Brigade leaves the Ryzen 9 3900X to 9 FPS of the i9-9900K ( -4.12% ).

The numbers in this section do not accompany those of Lisa Su, since it is 11 FPS in SOTTR (-8%), 25 FPS in Far Cry 5 (-19.68%), 24 FPS in Deus EX (-19, 51%), 13 in BFV (-8.72%) and 5 in F1 2018 (-2.79%) . This shows that, although the step forward is high compared to Pinnacle Ridge with the Ryzen 2000, it is not enough to reach Intel in this regard, since this is still superior.