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Tactically Inept

AMD Ryzen 7 (Zen 4)


kuhla

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  • 4 months later...
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Which with the addition of PCIe 5.0 support to the platform, is going to be a recurring theme. While AMD has baked in 5.0 support into the Raphael CPUs, it’s up to motherboard vendors to actually make it so. Compared to PCIe 4.0, 5.0 has much tighter signal integrity requirements (the signaling frequency has been doubled), which at least at this time, makes PCIe 5.0 expensive to implement. A very well-designed motherboard is required with impeccable traces, and on top of that the overall short throw of PCIe 5.0 means that retimers/redrivers become necessary rather quickly. So while AM5 can support PCIe 5.0 throughout, the reality is that we’re still going to see a lot of PCIe 4.0 in use even in higher-end motherboards.

As for the necessity of PCIe 5.0 overall, thus far AMD is primarily focused on what it means for NVMe drive speeds. The first generation of PCIe 5.0-enabled consumer SSDs are expected to land a bit later this year, and they should be able to hit sequential burst transfer rates above the limits of PCIe 4.0 (~7GB/sec).

Past that, NVIDIA’s newly announced Ada Lovelace architecture GeForce RTX 40 series video cards do not support PCIe 5.0. So while we’re awaiting AMD to announce their RDNA 3-based product lineup later this year, regardless of what AMD does, the bulk of video cards sold next year are not going to use PCIe 5.0. So there is a bit less pressure on motherboard manufactures (and motherboard buyers) to get boards that support PCIe 5.0 to anything beyond a couple of M.2 slots.

 

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Minor tweaking with undervolts and curves allows you to quickly tame that 95c stock performance to much much lower.  Partly dependent on silicon lottery but it seems like AMD did some wonky shit with their optimizations. 
This little set of tweaks seems like a must for anyone who doesn't want a goddamn space heater from ryzen 7000. 

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