NVIDIA GeForce GT 745A vs NVIDIA GeForce GT 640

Comparative analysis of NVIDIA GeForce GT 745A and NVIDIA GeForce GT 640 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: PassMark - G3D Mark, PassMark - G2D Mark, Geekbench - OpenCL, CompuBench 1.5 Desktop - Face Detection (mPixels/s), CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s), CompuBench 1.5 Desktop - T-Rex (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), 3DMark Fire Strike - Graphics Score.

NVIDIA GeForce GT 745A

NVIDIA GeForce GT 640

Differences

Reasons to consider the NVIDIA GeForce GT 745A

Videocard is newer: launch date 1 year(s) 2 month(s) later
Around 97% lower typical power consumption: 33 Watt vs 65 Watt
Around 1% higher memory clock speed: 1800 MHz vs 1782 MHz
Around 5% better performance in PassMark - G3D Mark: 1228 vs 1175
Around 10% better performance in PassMark - G2D Mark: 322 vs 292
5.3x better performance in Geekbench - OpenCL: 19809 vs 3755
Around 9% better performance in CompuBench 1.5 Desktop - Face Detection (mPixels/s): 12.446 vs 11.448
Around 35% better performance in CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s): 278.161 vs 206.777
Around 11% better performance in CompuBench 1.5 Desktop - T-Rex (Frames/s): 0.883 vs 0.792
Around 1% better performance in CompuBench 1.5 Desktop - Video Composition (Frames/s): 14.778 vs 14.637
Around 23% better performance in CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s): 25.74 vs 20.86

Specifications (specs)
Launch date	26 August 2013 vs 5 June 2012
Thermal Design Power (TDP)	33 Watt vs 65 Watt
Memory clock speed	1800 MHz vs 1782 MHz
Benchmarks
PassMark - G3D Mark	1228 vs 1175
PassMark - G2D Mark	322 vs 292
Geekbench - OpenCL	19809 vs 3755
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	12.446 vs 11.448
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	278.161 vs 206.777
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.883 vs 0.792
CompuBench 1.5 Desktop - Video Composition (Frames/s)	14.778 vs 14.637
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	25.74 vs 20.86

Reasons to consider the NVIDIA GeForce GT 640

Around 8% higher core clock speed: 902 MHz vs 837 MHz
Around 8% higher texture fill rate: 28.86 GTexel / s vs 26.78 GTexel / s
Around 8% better floating-point performance: 692.7 gflops vs 642.8 gflops

Core clock speed	902 MHz vs 837 MHz
Texture fill rate	28.86 GTexel / s vs 26.78 GTexel / s
Floating-point performance	692.7 gflops vs 642.8 gflops

Compare benchmarks

GPU 1: NVIDIA GeForce GT 745A
GPU 2: NVIDIA GeForce GT 640

PassMark - G3D Mark

GPU 1

GPU 2

1228

1175

PassMark - G2D Mark

GPU 1

GPU 2

322

292

Geekbench - OpenCL

GPU 1

GPU 2

19809

3755

CompuBench 1.5 Desktop - Face Detection (mPixels/s)

GPU 1

GPU 2

12.446

11.448

CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)

GPU 1

GPU 2

278.161

206.777

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

GPU 1

GPU 2

0.883

0.792

CompuBench 1.5 Desktop - Video Composition (Frames/s)

GPU 1

GPU 2

14.778

14.637

CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)

GPU 1

GPU 2

25.74

20.86

Name	NVIDIA GeForce GT 745A	NVIDIA GeForce GT 640
PassMark - G3D Mark	1228	1175
PassMark - G2D Mark	322	292
Geekbench - OpenCL	19809	3755
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	12.446	11.448
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	278.161	206.777
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.883	0.792
CompuBench 1.5 Desktop - Video Composition (Frames/s)	14.778	14.637
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	25.74	20.86
GFXBench 4.0 - Car Chase Offscreen (Frames)		2134
GFXBench 4.0 - Manhattan (Frames)		2375
GFXBench 4.0 - T-Rex (Frames)		3328
GFXBench 4.0 - Car Chase Offscreen (Fps)		2134
GFXBench 4.0 - Manhattan (Fps)		2375
GFXBench 4.0 - T-Rex (Fps)		3328
3DMark Fire Strike - Graphics Score		1565

Compare specifications (specs)

	NVIDIA GeForce GT 745A	NVIDIA GeForce GT 640
Essentials
Architecture	Kepler	Kepler
Code name	GK107	GK107
Launch date	26 August 2013	5 June 2012
Place in performance rating	1194	1195
Type	Desktop	Desktop
Launch price (MSRP)		$99
Price now		$59.99
Value for money (0-100)		25.25
Technical info
Core clock speed	837 MHz	902 MHz
Floating-point performance	642.8 gflops	692.7 gflops
Manufacturing process technology	28 nm	28 nm
Pipelines	384	384
Texture fill rate	26.78 GTexel / s	28.86 GTexel / s
Thermal Design Power (TDP)	33 Watt	65 Watt
Transistor count	1,270 million	1,270 million
Video outputs and ports
Display Connectors	No outputs	1x DVI, 1x HDMI, 1x DisplayPort
Compatibility, dimensions and requirements
Interface	PCIe 3.0 x16	PCIe 3.0 x16
Length		145 mm
Supplementary power connectors		None
API support
DirectX	12.0 (11_0)	12.0 (11_0)
OpenGL	4.6	4.6
Memory
Maximum RAM amount	2 GB	2 GB
Memory bandwidth	28.8 GB / s	28.51 GB / s
Memory bus width	128 Bit	128 Bit
Memory clock speed	1800 MHz	1782 MHz
Memory type	DDR3	DDR3