Comparison of GeForce 920M and GeForce GT 640M

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