Comparison of GeForce GT 640 and Radeon HD 6750M

Attribute	GeForce GT 640 ×	Radeon HD 6750M ×
GPU
Release year (year)	2012	2011
Reference card	Nvidia GeForce GT 640 902 MHz 2 GB	-
GPU brand	Nvidia	AMD
GPU name	GK107	Whistler
Market	Desktop	Laptop
Clock speed (MHz)	902	600
Is dual GPU	-	-
Model	GeForce GT 640	Radeon HD 6750M
Memory
Memory (MB)	1,024	1,024
Memory bandwidth (GB/s)	28.8	25.6
Memory bus (bit)	128	128
Memory type	DDR3	GDDR3
Memory clock speed (MHz)	900	800
Effective memory clock speed (MHz)	1,800	1,600
Noise and power
TDP (W)	65	35
Load power consumption (W)	208	-
Idle power consumption (W)	104	-
Load noise level (dB)	46.4	-
Idle noise level (dB)	46.4	-
Raw performance
Pixel rate (GPixel/s)	7.22	4.8
SMX units	2	-
Render output processors	16	8
Texture mapping units	32	24
Shading units	384	480
Floating-point performance (GFLOPS)	693	576
Compute units	-	6
Texture rate (GTexel/s)	28.86	14.4
Benchmarks
Metro: Last Light	28	-
Particle simulation (mInteraction/s)	-	94.05
T-Rex (Compubench 1.5) (frames/s)	-	0.35
Video composition (frames/s)	-	12.26
Dirt3	-	14.3
Crysis 2	-	12.4
Cloud Gate Factor	12.93	-
Battlefield 4	45	-
Face detection (mPixels/s)	11.31	4.37
Bitcoin mining (mHash/s)	20.86	30.43
Sky Diver Factor	143.75	-
Fire Strike Factor	16.68	-
Ocean surface simulation (frames/s)	209.1	255.45