Comparison of Radeon HD 6870 X2 and Radeon R9 285X

Attribute	Radeon R9 285X ×	Radeon HD 6870 X2 ×
GPU
Release year (year)	2016	2011
GPU brand	AMD	AMD
GPU name	Tonga	Barts XT
Market	-	Desktop
Clock speed (MHz)	1,002	900
Is dual GPU	-	+
Model	Radeon R9 285X	Radeon HD 6870 X2
Memory
Memory (MB)	3,072	2,048
Memory bandwidth (GB/s)	264	268.8
Memory bus (bit)	384	512
Memory type	GDDR5	GDDR5
Memory clock speed (MHz)	1,375	1,050
Effective memory clock speed (MHz)	5,500	4,200
Noise and power
TDP (W)	200	300
Raw performance
Pixel rate (GPixel/s)	32.1	57.6
Render output processors	32	64
Texture mapping units	128	112
Shading units	2,048	2,240
Floating-point performance (GFLOPS)	4,104	4,032
Compute units	32	28
Texture rate (GTexel/s)	128.3	100.8