Aurora R5, RTX = 20 results for you to read through to see what other users on this board have asked and answered.
I have a Alienware Aurora R5 Desktop Currently has 2x GTX 1080s with 850W Power Supply Will this machine support a RTX 3070 graphics card?  Will it support the RTX 30X0 series of graphics cards?   
Aurora R5, support for RTX graphics cards?