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

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