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by zokier 588 days ago
Gold rating is down to 20%, Titanium is to 10% https://en.wikipedia.org/wiki/80_Plus#Efficiency_level_certi...
1 comments

Platinum is 90% efficient at 20%, but OP is using a 1600W power supply, so that 20% is 320W. Any load below that is going to be less efficient.