When choosing a PSU for an RTX 5080, what factors beyond wattage, like efficiency and modularity, are essential? Given discussions about 750W minimums for prior generation GPUs like the RTX 3080, what's the optimal wattage for the 5080? How do 80+ efficiency ratings (Gold, Platinum, Titanium) impact long-term power savings and system stability? Does modularity significantly affect cable management and airflow? Considering discussions on "next-gen power" for RTX 50XX GPUs, are there specific PSU brands or models renowned for reliability and high-end GPU compatibility, like those mentioned in discussions of "A and B tier" PSUs for the RTX 4090? What features should be prioritized, and why?