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Cake day: June 18th, 2023

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  • What I mean by that is that they will take a huge disservice to their customers over a slight financial inconvenience (packaging and validating an existing fix for different CPU series with the same architecture).

    I don’t classify fixing critical vulnerabilities from products as recent as the last decade as “goodwill”, that’s just what I’d expect to receive as a customer: a working product with no known vulnerabilities left open. I could’ve bought a Ryzen 3000 CPU (maybe as part of cheap office PCs or whatever) a few days ago, only to now know they have this severe vulnerability with the label WONTFIX on it. And even if I bought it 5 years ago: a fix exists, port it over!

    I know some people say it’s not that critical of a bug because an attacker needs kernel access, but it’s a convenient part of a vulnerability chain for an attacker that once exploited is almost impossible to detect and remove.








  • Today’s CPUs usually expose some USB connections directly. Ryzen 7000 desktop CPUs expose 4 USB 3.2 Gen 2 directly on their on-package I/O die for example. So if you connect your USB drives directly to the ports your mainboard connects directly to the CPU, the chipset (“southbridge”) and any third-party USB controllers are out of the equation.

    This is just information, I’m not advising to use USB for fixed storage.


  • “ASRock” and “ASRock Rack” are two different series of motherboards.

    Here’s the QVL of one of their AM5 mainboards: https://www.asrockrack.com/general/productdetail.asp?Model=B650D4U-2L2T/BCM#Memory - it doesn’t limit these modules to specific CPUs. All CPUs with ECC compatibility also support these modules on this mainboard. Some of these Rack boards are over a year old, and they always had some ECC modules on their QVL. This - again - isn’t EPYC 4004 specific, they couldn’t have validated it with EPYC 4004 CPUs a year ago. In fact, their CPU support list doesn’t even list EPYC 4004 CPUs as of today, as they haven’t released a BIOS update adding (official) compatibility in for these CPUs (it will probably be released shortly though).

    ASRock Rack AM4 mainboards also officially support ECC memory. So if you wanted verified ECC support on a comparatively cheap AMD platform you could’ve always gone for one of these boards with a regular Ryzen CPU (not an APU). The boards are a bit on the expensive side but if you want official support (for whatever reason you’d need that in a homelab environment) you can get it.





  • PCIe is back- and forwards-compatible, so even an RTX 4090 would in theory work in a PCIe 2.0 x4 slot.

    Now, PCIe 2.0 x4 is obviously really slow compared to what most current cards support (PCIe 4.0 x16), but I doubt transcoding is bandwidth sensitive on the PCIe link.

    So pick pretty much any card, be wary though that some consumer-focused cards artificially limit the amount of concurrent transcoding sessions they support. Seems like Nvidia is limiting consumer cards to now 8 sessions, which is probably plenty.