how to make the most out of it? // 5090 FE VS. 3090

[kkort2022]

GPU (in that case 5090 FE) with 4,5gb at "Memory Buffer for Stability (VRAM GB)" at 28.7 of 31.5

how to make the most out of it?

I would be glad about some better fine-tuning help for 5090 FE or 3090...
(just because with a 3090 at its limits, it is pretty fast enough I predict)

[kkort2022]

for the very same config like before, but with more intense workload...

with AORUS 3090:

now the question is, how to make the most out of the 5090 and fight/avoid GPU spikes...