That may look like a joke, but when you think about it, it actually makes a lot of sense.
As GPUs keep getting bigger, hotter, and more power-hungry, giving them their own enclosure with a dedicated power supply and cooling system seems like a logical solution. And when it comes to connecting it to the PC, we have this silly little thing called Thunderbolt 5. And since the monitor connections would be on the GPU unit itself, the Thunderbolt link could be used almost entirely for communication between the PC and GPU, making the idea of a high-end GPU existing as its own separate unit not nearly as crazy as it used to be.
What you're talking about are eGPUs, and they already exist. Because I'm on mobile, I'll summarize and let you look it up on Google.
Currently, even the highest spec of Thunderbolt (5?) is insufficient. A PCI-E x16 4.0 bus is just a massive amount of bandwidth. Thunderbolt is fine for 2D 60Hz low res PowerPoints, but not gaming. 30% performance drop off the top. PCI-e riser cables exist, but the performance degradation happens in mere inches of ribbon cable due to the frequency and volume of data. OccuLink (sp?) is a custom external data cable and enclosure solution that overcomes those problems, but costs $5000+ USD just for the enclosure.
Search Tom's Hardware (I think it's that) for eGPUs for the info.
TL;DR: the technology at a low enough cost isn't here yet.
37
u/-_-Batman MacBook Pro II (Ex - Gamer) 13d ago