Comparison of GeForce 920M and GeForce GT 640M

Attribute	GeForce 920M ×	GeForce GT 640M ×
GPU
Release year (year)	2015	2012
Reference card	Nvidia GeForce 920M 775 MHz 1 GB	-
GPU brand	Nvidia	Nvidia
GPU name	GK208	GK107
Market	Laptop	Laptop
Clock speed (MHz)	954	625
Is dual GPU	-	-
Model	GeForce 920M	GeForce GT 640M
Memory
Memory (MB)	2,048	2,048
Memory bandwidth (GB/s)	14.4	28.8
Memory bus (bit)	64	128
Memory type	DDR3	DDR3
Memory clock speed (MHz)	900	900
Effective memory clock speed (MHz)	1,800	1,800
Noise and power
TDP (W)	33	32
Raw performance
Pixel rate (GPixel/s)	7.63	5
Render output processors	16	16
Texture mapping units	32	32
Shading units	384	384
Floating-point performance (GFLOPS)	733	480
Texture rate (GTexel/s)	30.53	20
Benchmarks
Battlefield 4	9.6	9.9
Face detection (mPixels/s)	8.36	7.86
T-Rex (GFXBench 3.0)	3358.92	3339.75
Manhattan (GFXBench 3.0)	3685.69	3590.88
Bitcoin mining (mHash/s)	40.41	17.38
Sky Diver Factor	102.8	106.74
Thief	5.95	8.35
Fire Strike Factor	10.41	11.26