Why the power draw between 270x and 280x is about 100w. Is 280x so power hungry? Can I get any less power hungry version of 280x.Like 270 are there any 280 GPU? I noticed the difference in a PSU calculator.
R9 280x = HD 7970 GE
R9 280 = HD 7950
R9 270x = HD 7870
R9 270 = HD 7850
now every R9 cards has got some little clock speed boost - that's all.