So, considering the temperatures obtained at the original frequency under Cinebench R23, 89°C, while we are under a custom watercooling, the overclocking margin might be quite limited. At the same time, this is good news since our Ryzen 9 7950X will offer excellent performance from the start.
Currently, to overclock our processor, we must either do it directly via the BIOS or via the AMD Ryzen Master software. It is the latter solution that we have chosen for these first tests.
Before starting, it is necessary to have one or more reference scores with your processors at stock frequencies, that is, without having made any modification except having activated the XMP/EXPO profile. It is also very important to have a sheet of paper at hand that will allow you to note down all the tests that you will perform as well as the results or failures. Personally, I have hundreds of sheets of my tests on which I sometimes return to know how the processor behaved on such motherboard or in such test conditions. My own little bible.
For H24 overclocking, it will of course be necessary to take more time to fine-tune the voltage in order to provide it with the minimum necessary but also to adjust each core independently if you want to take advantage of the maximum performance.
The idea of modifying the Load Line Calibration is that the voltage chosen should be as close as possible to the load voltage. AORUS offers several levels of “calibration” and we opted for the “Turbo” mode. This is the one we used in our previous tests with AORUS motherboards.
Since the motherboard has voltage measurement points on its PCB, we will be able to judge the impact of this setting on the vcore voltage, in other words, the CPU voltage.
Ryzen 9 7950X Operation:
Once again, we will start our overclocking tests via the OS using AMD Ryzen Master. It is a tool that can be used very easily and is therefore very intuitive provided that you have a good understanding of the structure of your processor and here more particularly that of the Ryzen 9 7950X. The Ryzen 9 7950X has two CCDs. Each CCD has a single CCX which has 8 cores. In the case of our 7950X, none of the CCX cores are disabled so that there are 8 cores per CCD and therefore 16 in total. The idea is to see how the CCDs behave when all the cores are used. We saw on page 5 that the CCD0 was more efficient than the CCD1. It will therefore be possible via Ryzen Master to try to push this one higher than the other. Finally, you can also decide to vary the frequency of each core. The one with a star is the one that performs best of the 8. To overclock, go to profile 1 and select manual overclocking. You can then control either each CCX or each core independently.
Overclocking in different stages:
We now know the potential of our Ryzen 7950X as we have already tested it on no less than four motherboards. Usually, we start the tests at 5000 MHz on both CCDs under Cinebench R23 multi. The idea is then to test the stability on several runs of Cinebench R23 multithread . If it’s stable, I increase the frequency by 100 MHz while checking the stability again. If the benchmark crashes, I increase the voltage slightly in order to regain a stability allowing to run the benchmark. The objective is to get a “quick” idea of the maximum benchmarkable frequency.
So we have directly placed the CCD0 at 5600 MHz and the CCD1 at 5400 MHz with a voltage of 1.20 volt which corresponds to 1.26/1.27v on the multimeter. Here are the scores we obtained by combining with the memory overclocking.
We obtained a score of 41497 points in Cinebench R23 and a score of 9329 points in single and 120411 in multi under Geekbench 3.4.4. Note that the memory score is also very interesting since it is 13 309 points.
Finally, and this is excellent news, it is possible to deactivate the synchronization between the BCLK frequency and the PCIe frequency via the BIOS. It will therefore be possible to overclock via the BCLK frequency.