Comparison of Radeon HD 7870 and Radeon R9 270

Attribute	Radeon HD 7870 ×	Radeon R9 270 ×
GPU
Release year (year)	2012	2013
GPU brand	AMD	AMD
GPU name	Pitcairn XT	Curacao
Market	Desktop	Desktop
Clock speed (MHz)	1,000	900
Turbo clock speed (MHz)	-	925
Is dual GPU	-	-
Model	Radeon HD 7870	Radeon R9 270
Memory
Memory (MB)	2,048	2,048
Memory bandwidth (GB/s)	153.6	179.2
Memory bus (bit)	256	256
Memory type	GDDR5	GDDR5
Memory clock speed (MHz)	1,200	1,400
Effective memory clock speed (MHz)	4,800	5,600
Noise and power
TDP (W)	175	150
Load power consumption (W)	295	-
Idle power consumption (W)	108	-
Load noise level (dB)	48.8	-
Idle noise level (dB)	39.5	-
Raw performance
Pixel rate (GPixel/s)	32	29.6
Render output processors	32	32
Texture mapping units	80	80
Shading units	1,280	1,280
Floating-point performance (GFLOPS)	2,560	2,368
Compute units	20	20
Texture rate (GTexel/s)	80	74
Benchmarks
Crysis 3	25.8	74
Battlefield 4	43	65
Face detection (mPixels/s)	55.45	57.24
T-Rex (GFXBench 3.0)	3352.76	3359.76
Manhattan (GFXBench 3.0)	3714.8	3717.7
Bitcoin mining (mHash/s)	294.21	251.26
Sky Diver Factor	324.89	312.65
Fire Strike Factor	50.19	49.6