The technical features in detail
A lot has also changed technically compared to the first work. This affects the additional L3 cache, the clock rates and the TDP class in which the X3D CPUs are located.
64 MB L3 cache sits on a CCD
As with the Ryzen 7 5800X3D, the 3D V-Cache placed on the chiplet is again 64 MB in size. "The chiplet" is to be taken literally, because even with the Ryzen 9 7950X3D and Ryzen 9 7900X3D, which, in contrast to the Ryzen 7 7800X3D, have two chiplets, the additional L3 cache die is only on one of the two CCDs.
Less to no reduction in turbo clock
Also new is that "X3D" does not automatically mean lower turbo clock rates. At least the two larger models no longer lose the maximum turbo clock compared to their X sister models: AMD still specifies the Ryzen 9 7950X with up to 5.7 GHz, the Ryzen 9 7900X3D with up to 5.6 GHz. The situation is different with the Ryzen 7 7800X3D, which clocks a maximum of 5.0 GHz, while the Ryzen 7 7700X achieves 5.4 GHz.
When asked, AMD explained to ComputerBase: The high turbo of the Ryzen 9 is due to the fact that only one chiplet carries the cache chip. As a result, the CCD with the cache also clocks lower with the Ryzen 9, with the Ryzen 7 there is only that. In games, however, the Ryzen 9 does not necessarily have to have a clock advantage over the Ryzen 7.
X3D means 120 watts for now
All three X3D CPUs are also specified by AMD with a 120 watt TDP. That's more than the Ryzen 7 7700X uses at 105 watts, but less than the two existing Ryzen 9s at 170 watts from the factory. The step makes sense with a view to the area of application of the X3D CPUs.
The Ryzen 9 hasn't needed its budget in games so far and if the X3D variants such as the Ryzen 7 5800X3D should act more efficiently again in gaming thanks to the additional cache, 120 watts TDP and the associated maximum power loss (PPT) should easily be enough to power the CPU to get maximum performance while gaming.
This will look different under full load in parallelized applications. There is no doubt that they will clock lower in applications that heavily load many cores and will therefore also be slower than the X variants. How strong remains to be seen - the X variants were only able to derive a small marginal benefit from the increased TDP compared to their predecessors, so the drop in performance could be lower than expected at first glance. In line with the lower TDP, the base clock of the X3D variants is consequently lower, although AMD has not yet given the final value for the Ryzen 7 7800X3D.
First manufacturer benchmarks
AMD has published its first benchmarks for the performance of two of the three X3D CPUs: Ryzen 9 7950X3D and Ryzen 7 7800X3D. As always, manufacturer benchmarks should be treated with caution, especially considering the spread of the Ryzen 7 5800X3D compared to Intel's offering: The larger L3 cache can have very different effects on the FPS from game to game and AMD shouldn't be able to case scenarios for the presentation.
The manufacturer compares the Ryzen 7 7800X3D, the " new ultimate gaming processor ", exclusively with the predecessor Ryzen 7 5800X3D and attests the CPU a 21 to 30 percent higher performance in four games in Full HD. The previously shared presentation did not reveal which graphics card was used, as the footnotes were outdated.
In a call to the CES 2023 keynote, the manufacturer also provided an FPS comparison between Ryzen 9 7950X3D and Intel Core i9-13900K, which AMD's CPU won in four games in Full HD with a lead of 13 to 24 percent. Because AMD still sees this CPU ahead of the Core i9-13900K in applications despite the reduced TDP, the manufacturer describes this model as " the ultimate hardware for gamers and creative people ". The two comparisons were no longer included in the final set of slides for the keynote. The slide then reappeared in the keynote – AMD probably wanted to avoid a leak here.
Available from February
Ryzen 9 7950X3D, Ryzen 9 7900X3D and Ryzen 7 7800X3D are scheduled to launch in February. AMD did not name prices in the run-up to the announcement at CES. If they are mentioned during the event, this content will be updated accordingly.
Three Ryzen 7000 with 65 watt TDP
In addition to the X3D variants for February, AMD also presented the Ryzen 9 7900, Ryzen 7 7700 and Ryzen 7 7600 at CES 2023, which are slowed down to 65 watts TDP (88 watts PPT). They are based on the same technology as the corresponding X models, but have a lower clock rate. On the other hand, the RRP falls (by USD 120 for the 7900, by USD 70 each for the 7700 and 7600), which the X models hardly exceed in retail after the massive price reduction at the end of 2022. The non-X models should also be listed below the RRP in the short term.
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