llamafilm Posted December 18, 2016 Share Posted December 18, 2016 I'm trying to understand device naming for SSDT work. I have two GPUs in my system. Titan Black is labeled clearly in ioreg as BR3C, and I'm able to use that name in an SSDT to modify it. But the second GPU (GTX 980 TI) is called "pci-bridge@10", and it's part of device BR2A, along with another PCIe card — a Decklink SDI. My motherboard is a Gigabyte X99 Designare, and I know that bandwidth is shared between certain slots. In this case, the Titan is shared with the Decklink, and the 980 is by itself. Can anyone explain why the 980 has this type of name, why it's shared, and how I can access it in an SSDT? Link to comment https://www.insanelymac.com/forum/topic/319367-how-to-identify-device-names/ Share on other sites More sharing options...
TheRacerMaster Posted December 21, 2016 Share Posted December 21, 2016 There are additional PCIe bridges under the H000 ACPI device which don't have ACPI device names. You could add ACPI devices (with the proper address) in your DSDT for the bridges, and then add one for the 980 (under the PCIe bridge@10). Link to comment https://www.insanelymac.com/forum/topic/319367-how-to-identify-device-names/#findComment-2337950 Share on other sites More sharing options...
llamafilm Posted December 21, 2016 Author Share Posted December 21, 2016 Thank you. How can I add ACPI devices for the bridge? I don't know how to address it. Link to comment https://www.insanelymac.com/forum/topic/319367-how-to-identify-device-names/#findComment-2337956 Share on other sites More sharing options...
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