Comparison of GeForce 820M and GeForce GTX 970M

Attribute	GeForce GTX 970M ×	GeForce 820M ×
GPU
Release year (year)	2014	2013
GPU brand	Nvidia	Nvidia
GPU name	GM204	GF117
Market	Laptop	Laptop
Clock speed (MHz)	1,038	625
Turbo clock speed (MHz)	993	-
Is dual GPU	-	-
Model	GeForce GTX 970M	GeForce 820M
Memory
Memory (MB)	6,144	1,024
Memory bandwidth (GB/s)	120.3	14.4
Memory bus (bit)	192	64
Memory type	GDDR5	DDR3
Memory clock speed (MHz)	1,253	900
Effective memory clock speed (MHz)	5,012	1,800
Noise and power
TDP (W)	-	15
Raw performance
Pixel rate (GPixel/s)	49.8	2.5
Render output processors	48	8
Texture mapping units	80	16
Shading units	1,280	96
Floating-point performance (GFLOPS)	2,657	240
Texture rate (GTexel/s)	83	10
Benchmarks
Bioshock Infinite	-	8.1
Hitman: Absolution	-	4.9
Battlefield 4	56.65	-
Face detection (mPixels/s)	59.43	7.69
T-Rex (GFXBench 3.0)	24269.7	3352.98
Manhattan (GFXBench 3.0)	17094.62	3533.46
Bitcoin mining (mHash/s)	313.57	23.26
Sky Diver Factor	371.7	66.09
Thief	47.85	-
Fire Strike Factor	59.95	7.57