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Zen 4 vs Zen 3: AMD Ryzen 9 7950X manages crucial performance efficiency gains over Ryzen 9 5950X despite huge TDP rise

Zen 4 processors will utilize socket AM5 while Zen 3 chips made use of socket AM4. (Image source: AMD - edited)
Zen 4 processors will utilize socket AM5 while Zen 3 chips made use of socket AM4. (Image source: AMD - edited)
The AMD Ryzen 9 7950X has been spotted on the SiSoftware Sandra database where it has produced very encouraging benchmark results. Some comparisons with the Zen 3-based Ryzen 9 5950X have shown the Zen 4 chip to be up to +118% quicker; however, in terms of performance efficiency the Ryzen 9 7950X still offers an edge, albeit a slight one.

It’s not too long before AMD will unleash Zen 4 properly upon us for sale and yet another benchmark appearance by a Ryzen 7000 desktop processor has suggested it will be a positive launch for Team Red. The 16-core, 32-thread high-end Ryzen 9 7950X was picked out of the Sandra database by APISAK, and it has amassed some very healthy scores in the Processor Multi-Media tests (see screenshots below). The same dataminer that shared the database entry also compared the results with those by an AMD Ryzen 9 5950X, with the Multi-Media Quad Int results showing a +118.56% difference in favor of the Zen 4 chip (Ryzen 9 7950X: 439.30 Mpix/s vs. Ryzen 9 5950X: 201 Mpix/s). With that kind of generational improvement, it appears we can just say Zen 4 is a massive success and Zen 3 is no longer relevant.

However, it is worth taking a deeper look into this particular benchmark appearance for the Ryzen 9 7950X as the above presumption isn’t particularly accurate or transparent. For a start, there are over 500 records for the Ryzen 9 5950X in the Processor Multi-Media benchmark alone. Fortunately, it is possible to compare the average score of those Zen 3 chips with the current score of the Zen 4 processor, and it makes for positive reading for the AMD Ryzen 9 7950X. The average score for the Ryzen 9 5950X with 21 CU average capacity, as the 16 CU average score is very low, is listed as 2,159.64 Mpix/s, while the Ryzen 7000 chip secures a result of 3,839.47 Mpix/s (16 CU capacity), which is a generous +77.78% difference. This should be enough to have bells tolling around the world announcing that a new desktop CPU champion has arrived, but it doesn’t consider TDP differences.

The Zen 3 Ryzen 9 5950X (3.4-4.9 GHz) could rely on a TDP of 105 W and AMD has now upped that to 170 W for the Ryzen 9 7950X (4.5-5.7 GHz). So, with the extra power and higher clock rates, the Zen 4 processor should be scoring way beyond what the Ryzen 9 5950X can manage, but when it comes down to efficiency it is possible the much-higher TDP could leave the Ryzen 9 7950X wanting. However, some calculation based on the above Mpix/s figures produces this simplified but promising news: The Zen 3 chip offered 20.57 Mpix/s per watt while the Zen 4 part seemingly produces 22.59 Mpix/s per watt in this scenario. For lovers of percentage differences, this places the AMD Ryzen 9 7950X an acceptable +9.82% ahead of its predecessor. Of course, there are caveats to be kept in mind, such as this being a potential maximum performance compared to an aggregate score. But it does appear that AMD hasn’t just whacked up the power levels without considering efficiency for Zen 4.

Buy the AMD Ryzen 7 5800X3D on Amazon

AMD Ryzen 9 7950X. (Image source: SiSoftware)
AMD Ryzen 9 7950X. (Image source: SiSoftware)
AMD Ryzen 9 7950X. (Image source: SiSoftware)
AMD Ryzen 9 7950X. (Image source: SiSoftware)
AMD Ryzen 9 5950X. (Image source: SiSoftware)
AMD Ryzen 9 5950X. (Image source: SiSoftware)

Source(s)

SiSoftware (1/2) & @TUM_APISAK

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> Notebook / Laptop Reviews and News > News > News Archive > Newsarchive 2022 09 > Zen 4 vs Zen 3: AMD Ryzen 9 7950X manages crucial performance efficiency gains over Ryzen 9 5950X despite huge TDP rise
Daniel R Deakin, 2022-09-16 (Update: 2022-09-16)