[berti]

In a similar boat with my old 4770k and a new RX580. I'm kicking myself for the k model though, as I would like to pass my old GPU through to a Windows VM, but the unlocked k model CPUs don't have VT-d, necessary for IOMMU.

[wila]

Buy a 4th gen second hand CPU? No need to kick yourself, those are cheap now.

For example: https://www.ebay.com/itm/Intel-i7-4770-3-4GHz-Quad-Core-Syst...

[chx]

This mistake was fixed in Devil's Canyon:

https://ark.intel.com/products/80807/Intel-Core-i7-4790K-Pro...

Intel® Virtualization Technology for Directed I/O (VT-d) ‡ Yes