NVIDIA GeForce GTX 660 Rev. 2 vs NVIDIA GeForce GT 640M Mac Edition

Comparative analysis of NVIDIA GeForce GTX 660 Rev. 2 and NVIDIA GeForce GT 640M Mac Edition videocards for all known characteristics in the following categories: Essentials, Technical info, Video outputs and ports, Compatibility, dimensions and requirements, API support, Memory. Benchmark videocards performance analysis: CompuBench 1.5 Desktop - Face Detection (mPixels/s), CompuBench 1.5 Desktop - T-Rex (Frames/s), CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s), CompuBench 1.5 Desktop - Video Composition (Frames/s), CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s), GFXBench 4.0 - Car Chase Offscreen (Frames), GFXBench 4.0 - Manhattan (Frames), GFXBench 4.0 - T-Rex (Frames), GFXBench 4.0 - Car Chase Offscreen (Fps), GFXBench 4.0 - Manhattan (Fps), GFXBench 4.0 - T-Rex (Fps).

NVIDIA GeForce GTX 660 Rev. 2

NVIDIA GeForce GT 640M Mac Edition

Differences

Reasons to consider the NVIDIA GeForce GTX 660 Rev. 2

Videocard is newer: launch date 1 year(s) 7 month(s) later
Around 32% higher core clock speed: 980 MHz vs 745 MHz
3.5x more texture fill rate: 82.56 GTexel / s vs 23.84 GTexel / s
2.5x more pipelines: 960 vs 384
3.5x better floating-point performance: 1,981 gflops vs 572.2 gflops
4x more maximum memory size: 2 GB vs 512 MB
Around 20% higher memory clock speed: 6008 MHz vs 5000 MHz
6x better performance in CompuBench 1.5 Desktop - Face Detection (mPixels/s): 39.216 vs 6.577
2.1x better performance in CompuBench 1.5 Desktop - T-Rex (Frames/s): 1.173 vs 0.559

Specifications (specs)
Launch date	13 September 2014 vs 3 February 2013
Core clock speed	980 MHz vs 745 MHz
Texture fill rate	82.56 GTexel / s vs 23.84 GTexel / s
Pipelines	960 vs 384
Floating-point performance	1,981 gflops vs 572.2 gflops
Maximum memory size	2 GB vs 512 MB
Memory clock speed	6008 MHz vs 5000 MHz
Benchmarks
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	39.216 vs 6.577
CompuBench 1.5 Desktop - T-Rex (Frames/s)	1.173 vs 0.559

Reasons to consider the NVIDIA GeForce GT 640M Mac Edition

4.4x lower typical power consumption: 32 Watt vs 140 Watt

Thermal Design Power (TDP)	32 Watt vs 140 Watt

Compare benchmarks

GPU 1: NVIDIA GeForce GTX 660 Rev. 2
GPU 2: NVIDIA GeForce GT 640M Mac Edition

CompuBench 1.5 Desktop - Face Detection (mPixels/s)

GPU 1

GPU 2

39.216

6.577

CompuBench 1.5 Desktop - T-Rex (Frames/s)

GPU 1

GPU 2

1.173

0.559

Name	NVIDIA GeForce GTX 660 Rev. 2	NVIDIA GeForce GT 640M Mac Edition
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	39.216	6.577
CompuBench 1.5 Desktop - T-Rex (Frames/s)	1.173	0.559
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)		226.218
CompuBench 1.5 Desktop - Video Composition (Frames/s)		11.947
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)		12.554
GFXBench 4.0 - Car Chase Offscreen (Frames)		1706
GFXBench 4.0 - Manhattan (Frames)		2983
GFXBench 4.0 - T-Rex (Frames)		5586
GFXBench 4.0 - Car Chase Offscreen (Fps)		28.9
GFXBench 4.0 - Manhattan (Fps)		48.1
GFXBench 4.0 - T-Rex (Fps)		99.8

Compare specifications (specs)

	NVIDIA GeForce GTX 660 Rev. 2	NVIDIA GeForce GT 640M Mac Edition
Essentials
Architecture	Kepler	Kepler
Code name	GK104	GK107
Launch date	13 September 2014	3 February 2013
Place in performance rating	1506	1507
Type	Desktop	Desktop
Technical info
Boost clock speed	1032 MHz
Core clock speed	980 MHz	745 MHz
Floating-point performance	1,981 gflops	572.2 gflops
Manufacturing process technology	28 nm	28 nm
Pipelines	960	384
Texture fill rate	82.56 GTexel / s	23.84 GTexel / s
Thermal Design Power (TDP)	140 Watt	32 Watt
Transistor count	3,540 million	1,270 million
Video outputs and ports
Display Connectors	2x DVI, 1x HDMI, 1x DisplayPort	No outputs
Compatibility, dimensions and requirements
Interface	PCIe 3.0 x16	PCIe 3.0 x16
Length	241 mm
Supplementary power connectors	1x 6-pin
API support
DirectX	12.0 (11_0)	12.0 (11_0)
OpenGL	4.6	4.6
Memory
Maximum RAM amount	2 GB	512 MB
Memory bandwidth	144.2 GB / s	40 GB / s
Memory bus width	192 Bit	64 Bit
Memory clock speed	6008 MHz	5000 MHz
Memory type	GDDR5	GDDR5