r9 380 or gtx 960 Mac Pro 1,1

[blindpcguy]

i have a msi geforce gtx 650 in my mac pro 1,1 debating between a amd r9 380 or a gtx 960 will be using os x for normal work already have 10.11.4 installed and windows 10 for gaming

 

[bmxfr]

don't now , the 960 is nod noisy 120w.