Interesting to see that an RTX 3080 is faster than a dual RTX 2080, and more than twice as fast a single RTX 2080, which is consistent with one of NVIDIA's claims.
RTX 3080 - ~30 TFLOPS, 760 GB/s
So for most things compute you'd expect anywhere from 70 % to 200 % performance increase. Note the significant increase in operational intensity in this generation, to about 160 FLOps per Float Load/Store (up from ~90). The fact that we're not seeing 200 % increase more widely can point at things like this being a problem for existing applications (so RTX 3080 is _even more_ memory constrained as previous cards [1]), and perhaps also some applications struggling feeding enough work items / scheduling issues in general.
[1] Alternative view: Even more operations you can do for free when you have to process a given buffer anyway!
Jesus.
It's fun to compare it with the historical top500 list: https://www.top500.org/statistics/perfdevel/
I think I know what Jesus In A Leather Jacket has planned for next year though.