Test: Alder Lake Intel i9-12900K and i5-12600K

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The frequencies reached :

As with every new CPU we test, our first idea is to check if the claimed and marketed frequencies can actually be reached. To do so, we will use Cinebench R23 benchmark. We test using the two benchmark computation, first the Single-Core benchmark and second the Multicore benchmark.

Test with our i9-12900K :

So, will the i9-12900k live up to everyone’s expectation ? Let’s see.

First step, we leave every setting in AUTO in the BIOS except for the XMP profile which we load to run the frequency of 5200 MHz 38-40-40-78 of our memory kit. We do not make any other changes in the BIOS. The idea is, as we said, to see if the frequencies are reached, out of the box.

Let’s start with a single core test in Cinebench R23. As you can see, we have several monitoring software such as Core temp or Hwmonitor to check the frequency.

No issue, we can see that two cores are regularly reaching 5.2 GHz, which is the boost frequency of our i9-12900K. It is the 4th core which reaches this frequency. In Multi-core, our i9-12900k also reaches the frequency it promises, with 4900 MHz on all of the eight performance cores.

Test with our i5-12600K :

Same goal with the i5-12600K. In single core, the 4900 MHz is reached on core 0. You can also notice that it is the one which is the hottest but this is excepted.

Finally, in multi-core, we reach a frequency of 4500 MHz on all six cores. We’ll talk about this later, but like the P-core, the E-core can also be overclocked, but only to a limited extent.

Now that we know that our two processors are fully functional, we can move on to our various other benchmarks.