Comparison of Sapphire Radeon HD 7770 and Radeon R7 250E

Attribute	Sapphire Radeon HD 7770 ×	Radeon R7 250E ×
GPU
Release year (year)	2012	2013
Reference card	AMD Radeon HD 7770 GHz Edition 1 GHz 1 GB	AMD Radeon R7 250E 800 MHz 1 GB
GPU brand	AMD	AMD
GPU name	Cape Verde XT	Cape Verde
Market	Desktop	Desktop
Clock speed (MHz)	1,150	800
Is dual GPU	-	-
Model	Sapphire Radeon HD 7770	Radeon R7 250E
Memory
Memory (MB)	1,024	1,024
Memory bandwidth (GB/s)	80	72
Memory bus (bit)	128	128
Memory type	GDDR5	GDDR5
Memory clock speed (MHz)	1,250	1,125
Effective memory clock speed (MHz)	5,000	4,500
Noise and power
TDP (W)	80	55
Load power consumption (W)	242	-
Idle power consumption (W)	106	-
Load noise level (dB)	41.4	-
Idle noise level (dB)	40	-
Raw performance
Pixel rate (GPixel/s)	18.4	12.8
Render output processors	16	16
Texture mapping units	40	32
Shading units	640	512
Floating-point performance (GFLOPS)	1,472	819
Compute units	10	8
Texture rate (GTexel/s)	46	25.6
Benchmarks
Crysis 3	48	-
Cloud Gate Factor	-	12.88
Battlefield 4	45	-
Face detection (mPixels/s)	32.42	21.57
T-Rex (GFXBench 3.0)	3355.14	3357.64
Manhattan (GFXBench 3.0)	3701.57	3602.72
Bitcoin mining (mHash/s)	153.66	98.3
Sky Diver Factor	221.64	167.17
Fire Strike Factor	30.64	16.82
Ocean surface simulation (frames/s)	-	582.96