NVIDIA GeForce GT 640M vs AMD Radeon HD 6620G

Comparative analysis of NVIDIA GeForce GT 640M and AMD Radeon HD 6620G videocards for all known characteristics in the following categories: Essentials, Technical info, Video outputs and ports, Compatibility, dimensions and requirements, API support, Memory, Technologies. 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).

NVIDIA GeForce GT 640M

AMD Radeon HD 6620G

Differences

Reasons to consider the NVIDIA GeForce GT 640M

Videocard is newer: launch date 9 month(s) later
A newer manufacturing process allows for a more powerful, yet cooler running videocard: 28 nm vs 32 nm
2.7x better performance in PassMark - G3D Mark: 928 vs 341
Around 95% better performance in PassMark - G2D Mark: 201 vs 103
3.3x better performance in Geekbench - OpenCL: 3185 vs 962
Around 87% better performance in GFXBench 4.0 - Car Chase Offscreen (Frames): 1476 vs 790
Around 12% better performance in GFXBench 4.0 - Manhattan (Frames): 1963 vs 1755
Around 87% better performance in GFXBench 4.0 - Car Chase Offscreen (Fps): 1476 vs 790
Around 12% better performance in GFXBench 4.0 - Manhattan (Fps): 1963 vs 1755

Specifications (specs)
Launch date	22 March 2012 vs 15 June 2011
Manufacturing process technology	28 nm vs 32 nm
Benchmarks
PassMark - G3D Mark	928 vs 341
PassMark - G2D Mark	201 vs 103
Geekbench - OpenCL	3185 vs 962
GFXBench 4.0 - Car Chase Offscreen (Frames)	1476 vs 790
GFXBench 4.0 - Manhattan (Frames)	1963 vs 1755
GFXBench 4.0 - Car Chase Offscreen (Fps)	1476 vs 790
GFXBench 4.0 - Manhattan (Fps)	1963 vs 1755

Reasons to consider the AMD Radeon HD 6620G

Around 4% higher pipelines: 400 vs 384
Around 28% better performance in GFXBench 4.0 - T-Rex (Frames): 3310 vs 2580
Around 28% better performance in GFXBench 4.0 - T-Rex (Fps): 3310 vs 2580

Specifications (specs)
Pipelines	400 vs 384
Benchmarks
GFXBench 4.0 - T-Rex (Frames)	3310 vs 2580
GFXBench 4.0 - T-Rex (Fps)	3310 vs 2580

Compare benchmarks

GPU 1: NVIDIA GeForce GT 640M
GPU 2: AMD Radeon HD 6620G

PassMark - G3D Mark

GPU 1

GPU 2

928

341

PassMark - G2D Mark

GPU 1

GPU 2

201

103

Geekbench - OpenCL

GPU 1

GPU 2

3185

962

GFXBench 4.0 - Car Chase Offscreen (Frames)

GPU 1

GPU 2

1476

790

GFXBench 4.0 - Manhattan (Frames)

GPU 1

GPU 2

1963

1755

GFXBench 4.0 - T-Rex (Frames)

GPU 1

GPU 2

2580

3310

GFXBench 4.0 - Car Chase Offscreen (Fps)

GPU 1

GPU 2

1476

790

GFXBench 4.0 - Manhattan (Fps)

GPU 1

GPU 2

1963

1755

GFXBench 4.0 - T-Rex (Fps)

GPU 1

GPU 2

2580

3310

Name	NVIDIA GeForce GT 640M	AMD Radeon HD 6620G
PassMark - G3D Mark	928	341
PassMark - G2D Mark	201	103
Geekbench - OpenCL	3185	962
CompuBench 1.5 Desktop - Face Detection (mPixels/s)	7.861
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)	275.972
CompuBench 1.5 Desktop - T-Rex (Frames/s)	0.727
CompuBench 1.5 Desktop - Video Composition (Frames/s)	15.445
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)	17.381
GFXBench 4.0 - Car Chase Offscreen (Frames)	1476	790
GFXBench 4.0 - Manhattan (Frames)	1963	1755
GFXBench 4.0 - T-Rex (Frames)	2580	3310
GFXBench 4.0 - Car Chase Offscreen (Fps)	1476	790
GFXBench 4.0 - Manhattan (Fps)	1963	1755
GFXBench 4.0 - T-Rex (Fps)	2580	3310

Compare specifications (specs)

	NVIDIA GeForce GT 640M	AMD Radeon HD 6620G
Essentials
Architecture	Kepler	Terascale 2
Code name	GK107	Llano
Launch date	22 March 2012	15 June 2011
Place in performance rating	1346	1349
Type	Laptop	Laptop
Technical info
Boost clock speed	645 MHz
CUDA cores	384
Floating-point performance	480.0 gflops
Manufacturing process technology	28 nm	32 nm
Pipelines	384	400
Thermal Design Power (TDP)	32 Watt
Transistor count	1,270 million	1000 Million
Core clock speed		400 MHz
Video outputs and ports
Display Connectors	No outputs
HDCP
HDMI
Maximum VGA resolution	Up to 2048x1536
Compatibility, dimensions and requirements
Bus support	PCI Express 2.0, PCI Express 3.0
Interface	PCIe 3.0 x16
Laptop size	medium sized	medium sized
API support
DirectX	12 API	11
OpenCL	1.1
OpenGL	4.5
Memory
Maximum RAM amount	2 GB
Memory bus width	128bit
Memory clock speed	1800 MHz
Memory type	DDR3\GDDR5
Shared memory	0	1
Technologies
3D Blu-Ray
3D Vision
CUDA
DirectCompute
DirectX 11	DirectX 11
Optimus