How can I check whether my Graphic Card is "muxed" or "muxless"?

My graphic card is an AMD HD 8730M, and on my Dell Inspiron 15r 5521 I've also got an Intel HD 4000.

But when I use the lspci command I only get this output for VGA:

VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller

VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Device 6601

And nothing else. My Dell laptop is overheating and I want to solve the problem. I already installed and configured the i8kmon utility, but that's not the way to solve the overheating problem at its root. So I need to check if my AMD HD 8730M card is muxless, otherwise I won't know if I can follow this guide: AMD/Intel Hybrid Graphics works


Mux stands for Multiplex and I believe it wants to know if you have a hardware multiplexer (Not sure about this).

There is a lot of useful information in the archwiki which might be of help.

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