I feel like we need to rethink pc architecture entirely. GPU’s are so insane now that we almost need a motherboard on top of a motherboard, one for cpu and one for gpu where the gpu is also socketed and can be upgraded. Memory too. Would allow board makers to deliver better power solutions and have less coil whine. Thinking like a pi hat bolted on top. Having its own ram slots and whatnot. Or more realistically it would go on the back, and the motherboard would move closer to the center of the chassis versus being on one side. Graphics cards are huge and having a massive card hanging off a tiny little slot with a cooler that is oftentimes bigger than the cpu cooler is just insane to me. We are at the long tail of a perpendicular mounted card methinks. Can’t really take it much further. Vertical mounting will soon become a necessity so I think we need to go back to first principles and rethink from the beginning.

> would that be hard to achieve?

Yes. Video memory runs on a substantially wider bus than system memory; the connectors that'd be required to make it replaceable would be extraordinarily expensive -- to the extent that it'd probably be cheaper to build the cards with their maximum complement of memory to begin with.

Yes, it would destroy GPU performance.

RAM stability is already pretty tough with modern speeds without putting it across a PCIe link.