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I'm on Windows 7. I just ran a Power Efficiency Diagnostics Report through powercfg -energy
and I got this error:
Platform Power Management Capabilities:PCI Express Active-State Power Management (ASPM) Disabled
PCI Express Active-State Power Management (ASPM) has been disabled due to a known incompatibility with the hardware in this computer.
I did some research in the Microsoft forums and it seems like a lot of people have this issue, but MS hasn't given anyone any satisfactory answers:
If there's anyone at Microsoft who actually knows what the "known incompatibility" is, they aren't saying. After searching Microsoft's website and the web for an answer and finding none, I've come to the conclusion that this is another one of those incomprehensible Windows messages that Microsoft tries to ignore ("...consult your original equipment manufacturer for assistance...") and nobody else can figure out.
from: http://answers.microsoft.com/en-us/windows/forum/windows_7-hardware/pcie-aspm-is-disabled-due-to-a-known/6ca12628-42ca-4804-af75-948199a7538a
more: http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/platform-power-management-capabilitiespci-express/8611ba23-8091-46ac-b1f3-97cba5b43455
Have any SuperUsers encountered this "hardware incompatibility" and figured out a way around it?
Makes sense, but how do I know if the new hardware I get is going to be compatible or not? Since the diagnostic describes it as a "known incompatibility", hopefully someone can explain what exactly is causing the incompatibility, so I know what part to replace, or what firmware to update. – Egghead99 – 2014-10-10T15:57:24.683
You can search for motherboards that have a compatible northbridge chipset. – Mr. Mascaro – 2014-10-10T16:00:48.197
I guess I'm still not understanding the underlying issue. So you're saying that the incompatibility is my motherboard? And that in order to enable PCIe ASPM I need a new motherboard that supports it? What are some examples or rules of thumb for motherboards that do support it? – Egghead99 – 2014-10-10T17:56:35.047
1Not always. I have a 3 week old Dell laptop that exhibits this issue... (an xps13) – Jonesome Reinstate Monica – 2016-03-14T20:41:43.260
This answer badly needs elaboration -- it doesn't explain much. For example, that old hardware may benefit from new firmware or drivers which may help alleviate the problem or fix it altogether. This answer might have been an okay addition to a user forum but it's hardly worth much on Super User. You don't tell super users to go and buy new computer. At least because there's plenty of people running expensive state of art workstations that get the same warning. ASPI has been around for years, too. – amn – 2019-08-27T09:59:05.747