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

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