Comparison of Radeon R9 285 and GeForce GTX 775M Mac

Attribute	Radeon R9 285 ×	GeForce GTX 775M Mac ×
GPU
Release year (year)	2014	2013
Reference card	AMD Radeon R9 285 918 MHz 2 GB	-
GPU brand	AMD	Nvidia
GPU name	Tonga	GK104
Market	Desktop	Laptop
Clock speed (MHz)	918	797
Turbo clock speed (MHz)	1,000	-
Is dual GPU	-	-
Model	Radeon R9 285	GeForce GTX 775M Mac
Memory
Memory (MB)	2,048	2,048
Memory bandwidth (GB/s)	176	160
Memory bus (bit)	256	256
Memory type	GDDR5	GDDR5
Memory clock speed (MHz)	1,375	1,250
Effective memory clock speed (MHz)	5,500	5,000
Noise and power
TDP (W)	190	100
Raw performance
Pixel rate (GPixel/s)	29.38	22.32
Render output processors	32	32
Texture mapping units	112	112
Shading units	1,792	1,344
Floating-point performance (GFLOPS)	3,290	2,142
Compute units	28	-
Texture rate (GTexel/s)	102.8	89.3
Benchmarks
FarCry 3	35	-
Particle simulation (mInteraction/s)	-	280.4
T-Rex (Compubench 1.5) (frames/s)	-	3.11
Video composition (frames/s)	-	56.67
Face detection (mPixels/s)	72.8	30.36
T-Rex (GFXBench 3.0)	3355.84	3357.2
Manhattan (GFXBench 3.0)	3715.04	3716.26
Bitcoin mining (mHash/s)	391.4	66.6
Sky Diver Factor	344.37	-
Fire Strike Factor	50.84	-
Ocean surface simulation (frames/s)	1474.63	1075.94