Comparison of Radeon R9 255 and Radeon E8860

Attribute	Radeon R9 255 ×	Radeon E8860 ×
GPU
Release year (year)	2013	2014
GPU brand	AMD	AMD
GPU name	Cape Verde	Venus
Market	Desktop	Laptop
Clock speed (MHz)	900	575
Turbo clock speed (MHz)	930	625
Is dual GPU	-	-
Model	Radeon R9 255	Radeon E8860
Memory
Memory (MB)	2,048	2,048
Memory bandwidth (GB/s)	73.6	72
Memory bus (bit)	128	128
Memory type	GDDR5	GDDR5
Memory clock speed (MHz)	1,150	1,125
Effective memory clock speed (MHz)	4,600	4,500
Noise and power
TDP (W)	65	37
Raw performance
Pixel rate (GPixel/s)	14.88	10
Render output processors	16	16
Texture mapping units	32	40
Shading units	512	640
Floating-point performance (GFLOPS)	952	800
Compute units	8	10
Texture rate (GTexel/s)	29.76	25
Benchmarks
Particle simulation (mInteraction/s)	-	197.07
T-Rex (Compubench 1.5) (frames/s)	-	1.68
Video composition (frames/s)	-	15.8
PassMark	1,765	1,657
PassMark Direct Compute	1,142	1,007
Cloud Gate Factor	14.43	-
Face detection (mPixels/s)	-	20.39
Bitcoin mining (mHash/s)	-	47.86
Sky Diver Factor	189.14	-
Fire Strike Factor	18.88	-
Ocean surface simulation (frames/s)	-	529.25