[Solved] Can someone help me understand my MacBook Pro PCIe interface please?
Hi there - I've had a good search but can't find the explicit information I'm looking for.
I have the Razer Core X plugged into one of the left hand ports as they report as being "PCIe Controller (x8)" ports in Windows device manager.
However, when I check my PCIe port bandwidth usage in GPU-Z (with a render test) it reports that the port is running at max PCI-Express x4 3.0.
I don't understand why it isn't using the whole x8 as I don't have any other devices connected to the other port on that side.
I also have an Oculus Rift S that I am plugging into one of the right hand side ports that come up labelled "PCIe Controller (x4)".
Everything works OK although I am a little disappointed with the overall Rift S performance, but unclear on whether my PCIe port usage has anything to do with it or not.
Thanks in advance for any pointers - I'm mostly just trying to understand the labeling of the PCIe interface in windows device manager and whether this has any correlation to expected bus speeds.
I'm an idiot. Let's just leave it at that 😀
Ok, just FYI ... the reason it's only showing as PCIe x4 is because of the Thunderbolt 3 connection is only as fast as PCIe x4:
Nice to see such a detailed article from Apple. It took quite a bit of googling to find that 🙂