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AMD Ryzen 9 7950X3D Processor $908.65 ($887.27 with eBay Plus) Delivered @ Computer Alliance eBay

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Appears to be an ATL for the 7950x3D

Worth noting that Zen 5 (Ryzen 9000) is not too far away (Q3/Q4), but it is also unlikely the x3D chips will be available at launch as was the case with the Zen 4's launch. Probably looking at over a years wait for the 9950x3D (or whatever the 7950x3D replacement is called) to arrive.

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closed Comments

  • +1

    Man still no price drop on the 7950x what gives

    • +2

      Probably not until the Zen 5 version drop. The 5950X is still quite expensive to this day relative to the rest of the Zen 3 lineup.

  • technically impressive, but the use case for this processor is very limited for the vast majority of the population,

    • +1

      Would you mind explaining the limitation?

      While I won't be purchasing this generation, the 9950x3D was looking very likely at being my next chip (from a 5800x3D.) Reason being I specially play games that hugely benefit from 3D vcache, as well as work loads that benefit from more cores.

      • +2

        7950X3D has dual CCD's with 8 cores on each CCD

        However, the V-Cache is only stacked on CCD1 (standard 32MB + V-Cache 64MB = 96MB total) whilst CCD2 only has the standard 32MB

        If the OS thread scheduler makes poor choices or you are running programs that actively use 9+ cores, the mismatch in cache can be a performance killer

        In some workloads, the cheaper 7950X with higher clocks and a smaller but uniform cache performs better

        This is also why the 7800X3D is the best Zen 4 CPU - it is basically CCD1 from a 7950X3D with all 8 cores having access to a uniform set of V-Cache

        • +1

          Interesting, thank you for taking the time to clarify.

          Hopefully the eventual 7950x3D replacement is an improvement in design choices.

          • @duckduckering: Technically, if budget is no limit the 7950X3D is the best Zen 4 gaming CPU, because its fundamentally a higher binned, higher clocked 7800X3D glued to a higher binned, higher clocked 7700X. If you don't mind having to manually assign processes to CCDs with process lasso, you effectively have a game running on an OCed 7800X3D by itself, with all the OS processes and other tasks running on the 7700X side.

            Main advantage of the 7800X3D is that because there's only the one CCD, its plug and play fully operational with no hiccups out of the box, and the performance loss compared to the 7950X3D in peak condition is marginal anyway, without having to deal with process lasso.

            As for the design choice, there won't be any change unless AMD drastically change their architecture. The chiplet design is AMD's biggest design win to come from Zen, it allow them to use the same production process for all of their CPUs and just use binning to determine CPU tiers. Each CCD is 8 cores (the 6 cores one are those with failed cores), and their lineup from the lowly 7600 all the way to the top EPYC chip is just about the quality of the CCD and how many of them are glued together. 7600 is 1 CCD with 2 failed cores, 7700 is 1 CCD with no failed cores, 7800X3D is a V-cache CCD with no failed cores, 7900X3D is 2 CCD, 1 with V-cache, both with 2 failed cores, and so on. That's why the 5800X3D was so expensive for so long, being a failed EPYC Milan 3D cache chip, its easily the highest quality silicon sold to consumer by AMD, that's why they could take the -20 all cores undervolt quite easily. What can improve however, is software detection (with or without assistance from the CPU, like with Intel's Thread Director) so that the right process stay on the right CCD.

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