Despite Apple Silicon currently working solely with its own on-board GPU cores, Apple is researching how to support more options, like PCI-E GPUs, all working in tandem.
One thing Intel Macs had that Apple Silicon ones do not, is the ability to use GPUs in external enclosures across Thunderbolt, or internally in a Mac Pro. There are just no provisions with Apple Silicon to do so, at present.
It might not be an issue that concerns most Mac users. It is a big deal for some — and particularly for Mac Pro buyers.
Now, however, a series of four newly-revealed patent applications appear to show that Apple is at least considering this issue.
Read more at AppleInsider.com