Bronze/Silver/Gold/Platinum/Titanium is the efficiency rating..Most PSUs run at maximum efficiency around 50% load..You can use the OuterVision Power Supply Calculator to estimate your system's wattage draw/need or use a Kill-A-Watt/Usage Monitor to find out exactly..It's more important to get the right wattage PSU..A higher wattage PSU with low load (overkill) might not be as efficient as a lower wattage one at higher loads.

Clearesult.com has a good breakdown of the 80 plus program and the ability to look up power supplies along with their specific efficiencies. Interestingly there are other efficiency ratings that are sometimes reported like ETA and lambda (some more real world conditions and relationship to noise). Interesting if you have the time to look into.

cpk72
I’m curious, are you planning a dual GPU build?

Yes, I am thinking about it, but I haven’t gotten as far as evaluating GPU candidates. I also already have a Corsair AX1200i on hand from a previous build and haven’t decided whether to cannibalize that.

Mifune

cpk72
Clearesult.com has a good breakdown of the 80 plus program and the ability to look up power supplies along with their specific efficiencies. Interestingly there are other efficiency ratings that are sometimes reported like ETA and lambda (some more real world conditions and relationship to noise). Interesting if you have the time to look into.

Thanks so much for this. That’s is exactly the kind of data I was hoping to see.

No problem, hope it helps

Which one did you end up getting?