Comparison of AMD Radeon HD 7970 GHz Edition and Radeon HD 7990

Attribute	AMD Radeon HD 7970 GHz Edition ×	Radeon HD 7990 ×
GPU
Release year (year)	2012	2013
Reference card	AMD Radeon HD 7970 925 MHz 3 GB	AMD Radeon HD 7990 950 MHz 6 GB
GPU brand	AMD	AMD
GPU name	Tahiti XT2	Malta
Market	Desktop	Desktop
Clock speed (MHz)	1,000	950
Turbo clock speed (MHz)	1,050	1,000
Is dual GPU	-	+
Model	AMD Radeon HD 7970 GHz Edition	Radeon HD 7990
Memory
Memory (MB)	3,072	6,144
Memory bandwidth (GB/s)	288	576
Memory bus (bit)	384	768
Memory type	GDDR5	GDDR5
Memory clock speed (MHz)	1,500	1,500
Effective memory clock speed (MHz)	6,000	6,000
Noise and power
TDP (W)	300	375
Load power consumption (W)	360	573
Idle power consumption (W)	112	135
Load noise level (dB)	53.1	60
Idle noise level (dB)	40.2	43
Raw performance
Pixel rate (GPixel/s)	33.6	64
Render output processors	32	64
^1↑Texture mapping units	128	256
Shading units	2,048	4,096
Floating-point performance (GFLOPS)	4,301	8,192
Compute units	32	64
Texture rate (GTexel/s)	134.4	256
Benchmarks
Crysis 3	28.3	-
Bioshock Infinite	78	-
Cloud Gate Factor	-	23
Face detection (mPixels/s)	94.02	90.43
T-Rex (GFXBench 3.0)	2798.85	3356.38
Manhattan (GFXBench 3.0)	2984.22	3716.14
Bitcoin mining (mHash/s)	487.62	458.53
Sky Diver Factor	380.04	393.8
Fire Strike Factor	62.9	75.52
Ocean surface simulation (frames/s)	-	1833.02