The Ryzen 9 7900X3D: wrong choice for gaming?

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This Monday at 3pm, we offered you our test of the new AMD Ryzen 9 7950X3D processor featuring the “3D V-Cache” technology which is materialized by the addition of 64 MB of L3 cache. We told you that two other processors would also be available: the Ryzen 9 7900X3D and the Ryzen 7 7800X3D. However, the latter would only be available on April 6. At the time of the publication of the tests this Monday 3 pm, we found very few opinions on the Ryzen 9 7900X3D model. AMD having proposed to the press the Ryzen 9 7950X3D model. We have to admit that we were surprised by this choice considering the samples provided by AMD for the Ryzen 7000X and Ryzen 7000 non-X.

What if the Ryzen 7 7800X3D was more interesting than the Ryzen 9 7900X3D?

To understand what makes us perplexed, we must take a look in the entrails of these processors. Here are those of our Ryzen 9 7950X3D which integrates two full CCDs, that is to say, with 2 x 8 cores, for a total of 16. It should be noted that for gaming use, only the CCD0 with “3D V-Cache” technology will be used, which means 8 cores.

Now let’s take a look at the other two processors in the 7000X3D range. Let’s start with the 7800X3D which will have only one CCD with 8 cores. For gaming use , no worries, they will all be dedicated.

But in the case of the Ryzen 9 7900X3D, which only has 12 cores, they are distributed equally over the CCDs, i.e. 6 for the CCD0 and 6 for the CCD1. In other words, during a gaming use, the CCD0 containing the “3D V-Cache” will be active but only on 6 cores whereas the 7800X3D which will be sold cheaper will have 8! We can therefore imagine that the 7800X3D should be more powerful than the 7900X3D in games. It remains to be seen if the 8 cores will be fully used in games and their operating frequencies compared to the 6 cores of the 7900X3D, but it is a question that we thought was relevant to raise!