Repurpose Hackintosh as a Steam Machine?

Like many others, my Hackintosh journey has come to an end. I had a good run, but couldn't face the battle of trying to upgrade the OS again on an old machine, so gave up & got an M4 pro Mac mini.

the machine in question is an I7-770k, RX580 rig with 64GB of DDR4 ram. (basically a 2017 high end iMac)

I could either flog the ram on Marketplace as it's so expensive now, & repurpose the dual Nvme drives or possibly try steamOS for gaming?

Anyone have experience on doing the same? Is my old graphics card likely to be the main limitation? Or the processor?