I get 20 t/s with a 70B 2.5bpw model, but this is only 47% of the theoretical maximum of 3090.

In comparison, the benchmarks on the exl2 github homepage show 35 t/s, which is 76% the theoretical maximum of 4090.

The bandwidth differences between the two GPUs aren’t huge, 4090 is only 7-8% higher.

Why? Does anyone else have a similar 20 t/s ? I don’t think my cpu performance is the issue.

The benchmarks also show ~85% utilization on 34B on 4bpw (normal models)