Comparison of AMD Radeon HD 7970 GHz Edition and Radeon HD 6990

Attribute	AMD Radeon HD 7970 GHz Edition ×	Radeon HD 6990 ×
GPU
Release year (year)	2012	2011
Reference card	AMD Radeon HD 7970 925 MHz 3 GB	AMD Radeon HD 6990 830 MHz 4 GB
GPU brand	AMD	AMD
GPU name	Tahiti XT2	Antilles
Market	Desktop	Desktop
Clock speed (MHz)	1,000	830
Turbo clock speed (MHz)	1,050	-
Is dual GPU	-	+
Model	AMD Radeon HD 7970 GHz Edition	Radeon HD 6990
Memory
Memory (MB)	3,072	4,096
Memory bandwidth (GB/s)	288	320
Memory bus (bit)	384	512
Memory type	GDDR5	GDDR5
Memory clock speed (MHz)	1,500	1,250
Effective memory clock speed (MHz)	6,000	5,000
Noise and power
^1↑TDP (W)	300	375
Load power consumption (W)	360	545
Idle power consumption (W)	112	140
Load noise level (dB)	53.1	66
Idle noise level (dB)	40.2	45.5
Raw performance
Pixel rate (GPixel/s)	33.6	53.12
Render output processors	32	64
Texture mapping units	128	192
Shading units	2,048	3,072
Floating-point performance (GFLOPS)	4,301	5,100
Compute units	32	48
Texture rate (GTexel/s)	134.4	159.4
Benchmarks
Crysis 3	28.3	-
Bioshock Infinite	78	-
Cloud Gate Factor	-	21.43
Face detection (mPixels/s)	94.02	17.28
T-Rex (GFXBench 3.0)	2798.85	3356.28
Manhattan (GFXBench 3.0)	2984.22	3713.7
Bitcoin mining (mHash/s)	487.62	265.3
Sky Diver Factor	380.04	340.31
Fire Strike Factor	62.9	45.35
Ocean surface simulation (frames/s)	-	840.45