[fmajid]

Have you seen the size of the heatsink on the Mac Studio Ultra? It's there for a reason...

[rsynnott]

It's a 60W part, so it would probably be _just_ about doable (old MBPs had up to about 75W worth of stuff to cool between CPU and GPU, though they definitely struggled a bit and the battery life on the dGPU ones was never amazing).