QNAP TS-h973AX motherboard

[ed]

Yes, this is a PCIe slot. But there is another way. People have used M.2 slot on 72XT series to install GPU card using PCIe extension cable like this https://amzn.to/3V6rww0
https://nascompares.com/answer/ts-873a-how-to-add-gpu/
https://nascompares.com/answer/qnap-tvs-...d-adapter/

I hope this helps.