Comparison of GeForce GT 640 and Radeon HD 4670 X2

Attribute	GeForce GT 640 ×	Radeon HD 4670 X2 ×
GPU
Release year (year)	2012	2008
Reference card	Nvidia GeForce GT 640 902 MHz 2 GB	-
GPU brand	Nvidia	ATI
GPU name	GK107	RV730
Market	Desktop	Desktop
Clock speed (MHz)	902	750
Is dual GPU	-	+
Model	GeForce GT 640	Radeon HD 4670 X2
Memory
Memory (MB)	1,024	1,024
Memory bandwidth (GB/s)	28.8	44.8
Memory bus (bit)	128	256
Memory type	DDR3	GDDR3
Memory clock speed (MHz)	900	700
Effective memory clock speed (MHz)	1,800	1,400
Noise and power
TDP (W)	65	118
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	12
SMX units	2	-
Render output processors	16	16
Texture mapping units	32	64
Shading units	384	640
Floating-point performance (GFLOPS)	693	960
Compute units	-	8
Texture rate (GTexel/s)	28.86	48
Benchmarks
Metro: Last Light	28	-
Cloud Gate Factor	12.93	-
Battlefield 4	45	-
Face detection (mPixels/s)	11.31	-
Bitcoin mining (mHash/s)	20.86	-
Sky Diver Factor	143.75	-
Fire Strike Factor	16.68	-
Ocean surface simulation (frames/s)	209.1	-