Comparison of Radeon HD 6770 and Radeon R7 250E

Attribute	Radeon HD 6770 ×	Radeon R7 250E ×
GPU
Release year (year)	2011	2013
Reference card	-	AMD Radeon R7 250E 800 MHz 1 GB
GPU brand	AMD	AMD
GPU name	Juniper XT	Cape Verde
Market	Desktop	Desktop
Clock speed (MHz)	850	800
Is dual GPU	-	-
Model	Radeon HD 6770	Radeon R7 250E
Memory
Memory (MB)	1,024	1,024
Memory bandwidth (GB/s)	76.8	72
Memory bus (bit)	128	128
Memory type	GDDR5	GDDR5
Memory clock speed (MHz)	1,200	1,125
Effective memory clock speed (MHz)	4,800	4,500
Noise and power
TDP (W)	108	55
Raw performance
Pixel rate (GPixel/s)	13.6	12.8
Render output processors	16	16
Texture mapping units	40	32
Shading units	800	512
Floating-point performance (GFLOPS)	1,360	819
Compute units	10	8
Texture rate (GTexel/s)	34	25.6
Benchmarks
Cloud Gate Factor	13.4	12.88
Face detection (mPixels/s)	9.78	21.57
T-Rex (GFXBench 3.0)	3359.32	3357.64
Manhattan (GFXBench 3.0)	3454.38	3602.72
Bitcoin mining (mHash/s)	118.06	98.3
Sky Diver Factor	122.24	167.17
Fire Strike Factor	15.87	16.82
Ocean surface simulation (frames/s)	599.48	582.96