Comparison of Radeon HD 6990 and Radeon HD 7990

Attribute	Radeon HD 6990 ×	Radeon HD 7990 ×
GPU
Release year (year)	2011	2013
Reference card	AMD Radeon HD 6990 830 MHz 4 GB	AMD Radeon HD 7990 950 MHz 6 GB
GPU brand	AMD	AMD
GPU name	Antilles	Malta
^1↑Market	Desktop	Desktop
Clock speed (MHz)	830	950
Turbo clock speed (MHz)	-	1,000
Is dual GPU	+	+
Model	Radeon HD 6990	Radeon HD 7990
Memory
Memory (MB)	4,096	6,144
Memory bandwidth (GB/s)	320	576
Memory bus (bit)	512	768
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	375
Load power consumption (W)	545	573
Idle power consumption (W)	140	135
Load noise level (dB)	66	60
Idle noise level (dB)	45.5	43
Raw performance
Pixel rate (GPixel/s)	53.12	64
Render output processors	64	64
Texture mapping units	192	256
Shading units	3,072	4,096
Floating-point performance (GFLOPS)	5,100	8,192
Compute units	48	64
Texture rate (GTexel/s)	159.4	256
Benchmarks
Cloud Gate Factor	21.43	23
Face detection (mPixels/s)	17.28	90.43
T-Rex (GFXBench 3.0)	3356.28	3356.38
Manhattan (GFXBench 3.0)	3713.7	3716.14
Bitcoin mining (mHash/s)	265.3	458.53
Sky Diver Factor	340.31	393.8
Fire Strike Factor	45.35	75.52
Ocean surface simulation (frames/s)	840.45	1833.02