Modern CPUs have 512bit registers, and don’t need bigger memory addresses. Not sure what the issue is.

That’s right the 390 was a 512 bit card. And it was a beast. I had a 7970 that lasted for a long time as a capable GPU.

My favorites were the 512bit bus monsters from 20 years ago. With raytracing being so memory and power intensive it kills me that we haven’t gotten a monster like the 8800gtx again