Comparison of Radeon HD 7970M and Radeon HD 7870

Attribute	Radeon HD 7870 ×	Radeon HD 7970M ×
GPU
Release year (year)	2012	2012
GPU brand	AMD	AMD
GPU name	Pitcairn XT	Wimbledon
Market	Desktop	Laptop
Clock speed (MHz)	1,000	850
Is dual GPU	-	-
Model	Radeon HD 7870	Radeon HD 7970M
Memory
Memory (MB)	2,048	2,048
Memory bandwidth (GB/s)	153.6	153.6
Memory bus (bit)	256	256
Memory type	GDDR5	GDDR5
Memory clock speed (MHz)	1,200	1,200
Effective memory clock speed (MHz)	4,800	4,800
Noise and power
TDP (W)	175	100
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	27.2
Render output processors	32	32
Texture mapping units	80	80
Shading units	1,280	1,280
Floating-point performance (GFLOPS)	2,560	2,176
Compute units	20	20
Texture rate (GTexel/s)	80	68
Benchmarks
Crysis 3	25.8	-
Battlefield 4	43	35.3
Face detection (mPixels/s)	55.45	51.64
T-Rex (GFXBench 3.0)	3352.76	3339.58
Manhattan (GFXBench 3.0)	3714.8	3713.82
Bitcoin mining (mHash/s)	294.21	257.3
Sky Diver Factor	324.89	271.71
Thief	-	33.5
Fire Strike Factor	50.19	46.48