PCIE slots not listed

Under the Motherboard tab PCI slots and their contents are listed, but PCIE slots are not listed.

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I don't know whether

1) this is a bug

2) they are not intended to be listed for some reason

or 3) I'm doing something incorrectly so I'm not seeing them

they show on my G1 Sniper M3, Z77 chipset, socket 1155, so Speccy itself is capable.

maybe it's a socket 1366 or a X58 chipset issue.