you can download the new E-Cycles 3.0.1 builds now! Those builds include over a 100 stability, workflow and performance improvements over the original 3.0 release.
The recommended drivers for NVidia GPUs are still the 472.12 ones. If you need newer ones, the 511 version are slightly slower (generally 2 to 5%) and have some stability issues but should be ok most of the time.
You can also get the latest 3.1 alphas with all the improvements from latest master!