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

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