NVIDIA GeForce 940A vs NVIDIA GeForce GT 645 OEM

Comparative analysis of NVIDIA GeForce 940A and NVIDIA GeForce GT 645 OEM 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, GFXBench 4.0 - Manhattan (Frames), GFXBench 4.0 - Manhattan (Fps), GFXBench 4.0 - T-Rex (Frames), GFXBench 4.0 - T-Rex (Fps).

NVIDIA GeForce 940A

NVIDIA GeForce GT 645 OEM

Differences

Reasons to consider the NVIDIA GeForce 940A

Videocard is newer: launch date 2 year(s) 10 month(s) later
Around 33% higher core clock speed: 1029 MHz vs 776 MHz
Around 33% higher pipelines: 384 vs 288
A newer manufacturing process allows for a more powerful, yet cooler running videocard: 28 nm vs 40 nm
3.1x lower typical power consumption: 33 Watt vs 102 Watt
Around 76% better performance in GFXBench 4.0 - T-Rex (Frames): 3361 vs 1914
Around 76% better performance in GFXBench 4.0 - T-Rex (Fps): 3361 vs 1914

Specifications (specs)
Launch date	13 March 2015 vs 24 April 2012
Core clock speed	1029 MHz vs 776 MHz
Pipelines	384 vs 288
Manufacturing process technology	28 nm vs 40 nm
Thermal Design Power (TDP)	33 Watt vs 102 Watt
Benchmarks
GFXBench 4.0 - T-Rex (Frames)	3361 vs 1914
GFXBench 4.0 - T-Rex (Fps)	3361 vs 1914

Reasons to consider the NVIDIA GeForce GT 645 OEM

2.1x more texture fill rate: 37.2 GTexel / s vs 17.98 GTexel / s
Around 4% better floating-point performance: 894.0 gflops vs 863.2 gflops
Around 91% higher memory clock speed: 3828 MHz vs 2002 MHz
Around 81% better performance in PassMark - G3D Mark: 2006 vs 1107
2.1x better performance in PassMark - G2D Mark: 443 vs 214

Specifications (specs)
Texture fill rate	37.2 GTexel / s vs 17.98 GTexel / s
Floating-point performance	894.0 gflops vs 863.2 gflops
Memory clock speed	3828 MHz vs 2002 MHz
Benchmarks
PassMark - G3D Mark	2006 vs 1107
PassMark - G2D Mark	443 vs 214

Compare benchmarks

GPU 1: NVIDIA GeForce 940A
GPU 2: NVIDIA GeForce GT 645 OEM

PassMark - G3D Mark

GPU 1

GPU 2

1107

2006

PassMark - G2D Mark

GPU 1

GPU 2

214

443

GFXBench 4.0 - T-Rex (Frames)

GPU 1

GPU 2

3361

1914

GFXBench 4.0 - T-Rex (Fps)

GPU 1

GPU 2

3361

1914

Name	NVIDIA GeForce 940A	NVIDIA GeForce GT 645 OEM
PassMark - G3D Mark	1107	2006
PassMark - G2D Mark	214	443
GFXBench 4.0 - Manhattan (Frames)	3615
GFXBench 4.0 - Manhattan (Fps)	3615
GFXBench 4.0 - T-Rex (Frames)	3361	1914
GFXBench 4.0 - T-Rex (Fps)	3361	1914

Compare specifications (specs)

	NVIDIA GeForce 940A	NVIDIA GeForce GT 645 OEM
Essentials
Architecture	Maxwell	Fermi 2.0
Code name	GM108	GF114
Launch date	13 March 2015	24 April 2012
Place in performance rating	723	557
Type	Desktop	Desktop
Technical info
Boost clock speed	1124 MHz
Core clock speed	1029 MHz	776 MHz
Floating-point performance	863.2 gflops	894.0 gflops
Manufacturing process technology	28 nm	40 nm
Pipelines	384	288
Texture fill rate	17.98 GTexel / s	37.2 GTexel / s
Thermal Design Power (TDP)	33 Watt	102 Watt
Transistor count		1,950 million
Video outputs and ports
Display Connectors	No outputs	2x DVI, 1x mini-HDMI
Compatibility, dimensions and requirements
Interface	PCIe 3.0 x8	PCIe 2.0 x16
Length		210 mm
API support
DirectX	12.0 (11_0)	12.0 (11_0)
OpenGL	4.6	4.6
Memory
Maximum RAM amount	1 GB	1 GB
Memory bandwidth	16.02 GB / s	91.9 GB / s
Memory bus width	64 Bit	192 Bit
Memory clock speed	2002 MHz	3828 MHz
Memory type	DDR3	GDDR5