NVIDIA GeForce 820A vs AMD Radeon HD 7640G

Comparative analysis of NVIDIA GeForce 820A and AMD Radeon HD 7640G 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, GFXBench 4.0 - Manhattan (Frames), GFXBench 4.0 - Manhattan (Fps), GFXBench 4.0 - T-Rex (Frames), GFXBench 4.0 - T-Rex (Fps), GFXBench 4.0 - Car Chase Offscreen (Frames), GFXBench 4.0 - Car Chase Offscreen (Fps).

NVIDIA GeForce 820A

AMD Radeon HD 7640G

Differences

Reasons to consider the NVIDIA GeForce 820A

Videocard is newer: launch date 1 year(s) 10 month(s) later
Around 56% higher core clock speed: 775 MHz vs 497 MHz
A newer manufacturing process allows for a more powerful, yet cooler running videocard: 28 nm vs 32 nm
Around 22% better performance in PassMark - G3D Mark: 556 vs 456
Around 27% better performance in PassMark - G2D Mark: 158 vs 124
2.5x better performance in Geekbench - OpenCL: 2983 vs 1188

Specifications (specs)
Launch date	17 March 2014 vs 15 May 2012
Core clock speed	775 MHz vs 497 MHz
Manufacturing process technology	28 nm vs 32 nm
Benchmarks
PassMark - G3D Mark	556 vs 456
PassMark - G2D Mark	158 vs 124
Geekbench - OpenCL	2983 vs 1188

Reasons to consider the AMD Radeon HD 7640G

2.7x more pipelines: 256 vs 96
Around 31% better performance in GFXBench 4.0 - Manhattan (Frames): 2245 vs 1716
Around 31% better performance in GFXBench 4.0 - Manhattan (Fps): 2245 vs 1716
Around 97% better performance in GFXBench 4.0 - T-Rex (Frames): 3355 vs 1705
Around 97% better performance in GFXBench 4.0 - T-Rex (Fps): 3355 vs 1705

Specifications (specs)
Pipelines	256 vs 96
Benchmarks
GFXBench 4.0 - Manhattan (Frames)	2245 vs 1716
GFXBench 4.0 - Manhattan (Fps)	2245 vs 1716
GFXBench 4.0 - T-Rex (Frames)	3355 vs 1705
GFXBench 4.0 - T-Rex (Fps)	3355 vs 1705

Compare benchmarks

GPU 1: NVIDIA GeForce 820A
GPU 2: AMD Radeon HD 7640G

PassMark - G3D Mark

GPU 1

GPU 2

556

456

PassMark - G2D Mark

GPU 1

GPU 2

158

124

Geekbench - OpenCL

GPU 1

GPU 2

2983

1188

GFXBench 4.0 - Manhattan (Frames)

GPU 1

GPU 2

1716

2245

GFXBench 4.0 - Manhattan (Fps)

GPU 1

GPU 2

1716

2245

GFXBench 4.0 - T-Rex (Frames)

GPU 1

GPU 2

1705

3355

GFXBench 4.0 - T-Rex (Fps)

GPU 1

GPU 2

1705

3355

Name	NVIDIA GeForce 820A	AMD Radeon HD 7640G
PassMark - G3D Mark	556	456
PassMark - G2D Mark	158	124
Geekbench - OpenCL	2983	1188
GFXBench 4.0 - Manhattan (Frames)	1716	2245
GFXBench 4.0 - Manhattan (Fps)	1716	2245
GFXBench 4.0 - T-Rex (Frames)	1705	3355
GFXBench 4.0 - T-Rex (Fps)	1705	3355
GFXBench 4.0 - Car Chase Offscreen (Frames)		636
GFXBench 4.0 - Car Chase Offscreen (Fps)		636

Compare specifications (specs)

	NVIDIA GeForce 820A	AMD Radeon HD 7640G
Essentials
Architecture	Fermi 2.0	Terascale 3
Code name	GF117	Trinity
Launch date	17 March 2014	15 May 2012
Place in performance rating	1288	1292
Type	Desktop	Laptop
Technical info
Core clock speed	775 MHz	497 MHz
Floating-point performance	297.6 gflops
Manufacturing process technology	28 nm	32 nm
Pipelines	96	256
Texture fill rate	12.4 GTexel / s
Thermal Design Power (TDP)	15 Watt
Transistor count	585 million
Boost clock speed		686 MHz
Video outputs and ports
Display Connectors	No outputs
Compatibility, dimensions and requirements
Interface	PCIe 2.0 x16
Laptop size		medium sized
API support
DirectX	12.0 (11_0)	11
OpenGL	4.6
Memory
Maximum RAM amount	1 GB
Memory bandwidth	14.4 GB / s
Memory bus width	64 Bit
Memory clock speed	1800 MHz
Memory type	DDR3
Shared memory		1