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I tried this and I am pretty sure that your screenshot is showing the PCIe version of the device plugged into the slot rather then the capability of the slot itself.
– Clifford
Commented Apr 27, 2019 at 7:55
@Clifford Hmm, ok. I wonder if anyone has come up with a reliable way to pin this down.
– flow2k
Commented Nov 28, 2020 at 2:56
@Clifford the screenshot was made on a laptop with chipset integrated GPU with no other devices, so the value showed is the maximum value ever possible on this chipset, so technically value is the same as the slot value, I am very doubtful about some 3rd party device having higher speed than the native GPU
– Suncatcher
Commented Nov 28, 2020 at 15:55
This is the right answer. It does say PCI Express Version Supported: v2.4 with v6.42
– zar
Commented Feb 26, 2021 at 4:11

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