The frequencies reached?
As with all new processor tests, our first idea is to check if the announced frequencies are actually reached. To do this, we will use the Cinebench R23 benchmark. Two cases will be used: a single core bench and a second one in multi core. The idea is to be able to judge the frequency reached and thus, to compare with what was announced by AMD in its slides.
Remember that the Boost frequency in bench is different depending on the processor. Be careful, as AMD points out, when we talk about maximum Boost frequency, it is the maximum frequency achievable by one of the processor’s cores running a workload in single core(mono-thread). The maximum boost varies according to several factors: the load, the cooling system and therefore the temperature of your processor. This is a notion to keep in mind. Here are the maximum frequencies that we should reach on a single core during our run under Cinebench R23.
First step, we leave everything in AUTO in the BIOS except the EXPO profile which we load in order to have a frequency of 6000 MT/s in 30-38-38-96 for our memory kit. We do not make any other changes in the BIOS.
Testing with the Ryzen 9 7900:
Here we go with the strongest non-X processor, the Ryzen 9 7900. As you can see, we opened several windows to check the frequency as well as the temperature.
In single core, we can see that core #2 reaches a frequency of 5450 MHz which is slightly higher than the 5.4 GHz announced by AMD. The reason for this is most likely the cooler temperatures brought on by our liquid cooling.
When the 12 cores of our Ryzen 7950X are used, the frequency varies depending on the CCD. On CCD 0, the frequency stabilizes at 4350 MHz and on CCD 1 at 4250 MHz. So, to put it simply, 6 cores at 4350 MHz and the other 6 at 4250 MHz. The CCD 0 is therefore more powerful.
The other element to take into account is undoubtedly the temperature. We are equipped with a 480 mm custom cooling loop and a very large difference is felt compared to the Ryzen 9 7900X which was flirting with 83°C while we are here at 47°C. It is indeed cooler in the lab at this time, but it is mainly the lower frequency of the 7900 and therefore also a lower voltage that explains these cooler temperatures. We can therefore imagine without fear an aircooling solution which was unthinkable with the Ryzen 7000X.
Testing with the Ryzen 7 7700 :
We continue with the Ryzen 7 7700 and its 8 cores. In single core, we can see that the #4 core reaches a frequency of 5350 MHz which is a bit higher than the 5.3 GHz announced by AMD. So our processor is perfectly operational.
When the 8 cores are used, the frequency varies slightly although all the cores are in a single CCD. We can thus read a frequency of 4875 MHz on all the cores with a maximum temperature during the R23 benchmark of 50°C.
Against the Ryzen 7 7700X, the frequency when all the cores were solicited rose to 5275 MHz but the temperature was also much higher with 84°C.
Testing with the Ryzen 5 7600 :
Let’s go to the Ryzen 5 7600 and its 6 cores. In single core, we can see that core #1 reaches a frequency of 5150 MHz which is like the two previous processors, slightly higher than the 5.1 GHz announced by AMD.
When the 6 cores are called upon, the frequency no longer varies according to the CCD since the Ryzen 5 7600 has only one CCD. The 6 cores stabilize at 4875 MHz on a multithreadedtask.
Good news, our three processors seem to be perfectly operational to start our different benchmarks.
We take a look at the Ryzen 7000 tested:
We thought it would be interesting to provide you with a summary table of the real frequencies we found during our tests. You will be able to better understand the results on the following pages.
As you can see, the frequencies of the Ryzen 7000X processors are much higher and will consequently give higher scores in the benchmarks against the non-X Ryzen 7000 with the same number of cores and threads. Temperatures will also be quite different, as a higher voltage is needed to hold these higher frequencies. No doubt we will also be looking at the differences in power consumption between these processors.
