Comparison of AMD Radeon HD 7970 GHz Edition and Radeon R9 285

Attribute	Radeon R9 285 ×	AMD Radeon HD 7970 GHz Edition ×
GPU
Release year (year)	2014	2012
Reference card	AMD Radeon R9 285 918 MHz 2 GB	AMD Radeon HD 7970 925 MHz 3 GB
GPU brand	AMD	AMD
GPU name	Tonga	Tahiti XT2
Market	Desktop	Desktop
Clock speed (MHz)	918	1,000
Turbo clock speed (MHz)	1,000	1,050
Is dual GPU	-	-
Model	Radeon R9 285	AMD Radeon HD 7970 GHz Edition
Memory
Memory (MB)	2,048	3,072
Memory bandwidth (GB/s)	176	288
Memory bus (bit)	256	384
Memory type	GDDR5	GDDR5
Memory clock speed (MHz)	1,375	1,500
Effective memory clock speed (MHz)	5,500	6,000
Noise and power
TDP (W)	190	300
Load power consumption (W)	-	360
Idle power consumption (W)	-	112
Load noise level (dB)	-	53.1
Idle noise level (dB)	-	40.2
Raw performance
Pixel rate (GPixel/s)	29.38	33.6
Render output processors	32	32
Texture mapping units	112	128
Shading units	1,792	2,048
Floating-point performance (GFLOPS)	3,290	4,301
Compute units	28	32
Texture rate (GTexel/s)	102.8	134.4
Benchmarks
FarCry 3	35	-
^1↑Crysis 3	-	28.3
Bioshock Infinite	-	78
Face detection (mPixels/s)	72.8	94.02
T-Rex (GFXBench 3.0)	3355.84	2798.85
Manhattan (GFXBench 3.0)	3715.04	2984.22
Bitcoin mining (mHash/s)	391.4	487.62
Sky Diver Factor	344.37	380.04
Fire Strike Factor	50.84	62.9
Ocean surface simulation (frames/s)	1474.63	-