3 ms·

Now that's annoying. That specs page for the 8700G used to say "ECC Support: Yes (Requires platform support)" three weeks ago. They've since removed it.

p_l 3y ago
Because people get boards that do not support it then complain to AMD. Easier to just not claim it's there, like AMD used to. That said, thanks to AMD UEFI modules always exporting their settings databases, even if vendor didn't provide options to configure things, you can always try to enable ECC (and various other things - beware of possibly damaging the hardware!).
- pedrocr 3y ago
  Hopefully that's it. In the previous generation only the PRO parts had ECC and those were only sold to OEMs.
  - p_l 3y ago
    The PRO parts are "certified" to have ECC working. Essentially it's binning - AMD takes portion of the bins and runs them through more verification steps including ECC tests. The rest does not get run through ECC testing, but have the exact same parts, and - unlike Intel - AMD does not lock ECC out on them. The CPUs are physically the same except for branding detail.
    - bryanlarsen 3y ago
      But parts that fail the PRO tests can be sold as non-pro parts, so you better hope you don't get one of those.
    - c0l0 3y ago
      This is (slightly) wrong. ALL Socket AM4 Ryzen CPUs without an iGPU have working ECC support. ONLY AM4 Ryzen APUs (i.e., CPUs with an iGPU) with the "PRO" infix in their name have working ECC support. However, ALL AM4 platform ECC support also depends on the motherboard vendor/firmware. There are boards on which ECC simply will not work, no matter if your CPU and DIMM combination actually supports it. You have to check the mobo specsheet to make sure it does - ASUS and ASRock, for example, support ECC on most of their boards with a suitable selection of CPU/APU and DIMM. To illustrate the CPU situation with a few examples: - Ryzen 5 3600 - proper, working ECC support possible. - Ryzen 7 5800X - proper, working ECC support possible. - Ryzen 9 3900X - proper, working ECC support possible. - Ryzen 5 5600G - no ECC support possible. - Ryzen 7 5700G - no ECC support possible. - Ryzen 5 PRO 5650G - proper, working ECC support possible. - Ryzen 7 PRO 4750G - proper, working ECC support possible.
      - p_l 3y ago
        Apparently this might be specific to AM4 iGPU models? I've seen suggestions that for PRO, the memory controllers were redone. Wouldn't surprise me if the story is that Cezanne had a design error resulting in inoperational ECC, especially given that unlike done other models in the series they are not chiplet based.
adrian_b 3y ago
Yes, I have just noticed this too. Even weirder is that the AMD specification pages have stated that both Rembrandt (Ryzen 6000 series) and Phoenix (Ryzen 7040 series) support ECC, for about a year and a half. Then suddenly, some time in Q3 2023, they have removed ECC from their specifications. Because Ryzen 8000G is just Phoenix or Hawk Point (the AMD information about this, i.e. about the speed of the NPU, has been contradictory) in another package, I was initially surprised that they have decided to support ECC in it, but now I see that they have reverted again the decision.

p_l 3y ago

Because people get boards that do not support it then complain to AMD. Easier to just not claim it's there, like AMD used to. That said, thanks to AMD UEFI modules always exporting their settings databases, even if vendor didn't provide options to configure things, you can always try to enable ECC (and various other things - beware of possibly damaging the hardware!).

pedrocr 3y ago
Hopefully that's it. In the previous generation only the PRO parts had ECC and those were only sold to OEMs.
- p_l 3y ago
  The PRO parts are "certified" to have ECC working. Essentially it's binning - AMD takes portion of the bins and runs them through more verification steps including ECC tests. The rest does not get run through ECC testing, but have the exact same parts, and - unlike Intel - AMD does not lock ECC out on them. The CPUs are physically the same except for branding detail.
  - bryanlarsen 3y ago
    But parts that fail the PRO tests can be sold as non-pro parts, so you better hope you don't get one of those.
  - c0l0 3y ago
    This is (slightly) wrong. ALL Socket AM4 Ryzen CPUs without an iGPU have working ECC support. ONLY AM4 Ryzen APUs (i.e., CPUs with an iGPU) with the "PRO" infix in their name have working ECC support. However, ALL AM4 platform ECC support also depends on the motherboard vendor/firmware. There are boards on which ECC simply will not work, no matter if your CPU and DIMM combination actually supports it. You have to check the mobo specsheet to make sure it does - ASUS and ASRock, for example, support ECC on most of their boards with a suitable selection of CPU/APU and DIMM. To illustrate the CPU situation with a few examples: - Ryzen 5 3600 - proper, working ECC support possible. - Ryzen 7 5800X - proper, working ECC support possible. - Ryzen 9 3900X - proper, working ECC support possible. - Ryzen 5 5600G - no ECC support possible. - Ryzen 7 5700G - no ECC support possible. - Ryzen 5 PRO 5650G - proper, working ECC support possible. - Ryzen 7 PRO 4750G - proper, working ECC support possible.
    - p_l 3y ago
      Apparently this might be specific to AM4 iGPU models? I've seen suggestions that for PRO, the memory controllers were redone. Wouldn't surprise me if the story is that Cezanne had a design error resulting in inoperational ECC, especially given that unlike done other models in the series they are not chiplet based.

adrian_b 3y ago

Yes, I have just noticed this too. Even weirder is that the AMD specification pages have stated that both Rembrandt (Ryzen 6000 series) and Phoenix (Ryzen 7040 series) support ECC, for about a year and a half. Then suddenly, some time in Q3 2023, they have removed ECC from their specifications. Because Ryzen 8000G is just Phoenix or Hawk Point (the AMD information about this, i.e. about the speed of the NPU, has been contradictory) in another package, I was initially surprised that they have decided to support ECC in it, but now I see that they have reverted again the decision.