NVIDIA GeForce 840A vs NVIDIA GeForce GT 755M

Comparative analysis of NVIDIA GeForce 840A and NVIDIA GeForce GT 755M 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, GFXBench 4.0 - Car Chase Offscreen (Frames), GFXBench 4.0 - Car Chase Offscreen (Fps), GFXBench 4.0 - Manhattan (Frames), GFXBench 4.0 - Manhattan (Fps), GFXBench 4.0 - T-Rex (Frames), GFXBench 4.0 - T-Rex (Fps), 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), 3DMark Fire Strike - Graphics Score.

NVIDIA GeForce 840A

NVIDIA GeForce GT 755M

Differences

Reasons to consider the NVIDIA GeForce 840A

Videocard is newer: launch date 8 month(s) later
Around 5% higher core clock speed: 1029 MHz vs 980 MHz
Around 15% better floating-point performance: 863.2 gflops vs 752.6 gflops
Around 52% lower typical power consumption: 33 Watt vs 50 Watt
Around 13% better performance in Geekbench - OpenCL: 5596 vs 4935

Specifications (specs)
Launch date	17 March 2014 vs 25 June 2013
Core clock speed	1029 MHz vs 980 MHz
Floating-point performance	863.2 gflops vs 752.6 gflops
Thermal Design Power (TDP)	33 Watt vs 50 Watt
Benchmarks
Geekbench - OpenCL	5596 vs 4935

Reasons to consider the NVIDIA GeForce GT 755M

Around 74% higher texture fill rate: 31.36 GTexel / s vs 17.98 GTexel / s
2x more maximum memory size: 2 GB vs 1 GB
2.7x more memory clock speed: 5400 MHz vs 2002 MHz
Around 50% better performance in PassMark - G3D Mark: 1688 vs 1123
Around 48% better performance in PassMark - G2D Mark: 326 vs 221
Around 41% better performance in GFXBench 4.0 - Car Chase Offscreen (Frames): 3093 vs 2188
Around 41% better performance in GFXBench 4.0 - Car Chase Offscreen (Fps): 3093 vs 2188
Around 51% better performance in GFXBench 4.0 - Manhattan (Frames): 3504 vs 2314
Around 51% better performance in GFXBench 4.0 - Manhattan (Fps): 3504 vs 2314
Around 7% better performance in GFXBench 4.0 - T-Rex (Frames): 3344 vs 3117
Around 7% better performance in GFXBench 4.0 - T-Rex (Fps): 3344 vs 3117

Specifications (specs)
Texture fill rate	31.36 GTexel / s vs 17.98 GTexel / s
Maximum memory size	2 GB vs 1 GB
Memory clock speed	5400 MHz vs 2002 MHz
Benchmarks
PassMark - G3D Mark	1688 vs 1123
PassMark - G2D Mark	326 vs 221
GFXBench 4.0 - Car Chase Offscreen (Frames)	3093 vs 2188
GFXBench 4.0 - Car Chase Offscreen (Fps)	3093 vs 2188
GFXBench 4.0 - Manhattan (Frames)	3504 vs 2314
GFXBench 4.0 - Manhattan (Fps)	3504 vs 2314
GFXBench 4.0 - T-Rex (Frames)	3344 vs 3117
GFXBench 4.0 - T-Rex (Fps)	3344 vs 3117

Compare benchmarks

GPU 1: NVIDIA GeForce 840A
GPU 2: NVIDIA GeForce GT 755M

PassMark - G3D Mark

GPU 1

GPU 2

1123

1688

PassMark - G2D Mark

GPU 1

GPU 2

221

326

Geekbench - OpenCL

GPU 1

GPU 2

5596

4935

GFXBench 4.0 - Car Chase Offscreen (Frames)

GPU 1

GPU 2

2188

3093

GFXBench 4.0 - Car Chase Offscreen (Fps)

GPU 1

GPU 2

2188

3093

GFXBench 4.0 - Manhattan (Frames)

GPU 1

GPU 2

2314

3504

GFXBench 4.0 - Manhattan (Fps)

GPU 1

GPU 2

2314

3504

GFXBench 4.0 - T-Rex (Frames)

GPU 1

GPU 2

3117

3344

GFXBench 4.0 - T-Rex (Fps)

GPU 1

GPU 2

3117

3344

Name	NVIDIA GeForce 840A	NVIDIA GeForce GT 755M
PassMark - G3D Mark	1123	1688
PassMark - G2D Mark	221	326
Geekbench - OpenCL	5596	4935
GFXBench 4.0 - Car Chase Offscreen (Frames)	2188	3093
GFXBench 4.0 - Car Chase Offscreen (Fps)	2188	3093
GFXBench 4.0 - Manhattan (Frames)	2314	3504
GFXBench 4.0 - Manhattan (Fps)	2314	3504
GFXBench 4.0 - T-Rex (Frames)	3117	3344
GFXBench 4.0 - T-Rex (Fps)	3117	3344
CompuBench 1.5 Desktop - Face Detection (mPixels/s)		12.449
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)		455.796
CompuBench 1.5 Desktop - T-Rex (Frames/s)		1.295
CompuBench 1.5 Desktop - Video Composition (Frames/s)		24.566
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)		28.025
3DMark Fire Strike - Graphics Score		2148

Compare specifications (specs)

	NVIDIA GeForce 840A	NVIDIA GeForce GT 755M
Essentials
Architecture	Maxwell	Kepler
Code name	GM108	GK107
Launch date	17 March 2014	25 June 2013
Place in performance rating	987	988
Type	Desktop	Laptop
Technical info
Boost clock speed	1124 MHz
Core clock speed	1029 MHz	980 MHz
Floating-point performance	863.2 gflops	752.6 gflops
Manufacturing process technology	28 nm	28 nm
Pipelines	384	384
Texture fill rate	17.98 GTexel / s	31.36 GTexel / s
Thermal Design Power (TDP)	33 Watt	50 Watt
Transistor count		1,270 million
Video outputs and ports
Display Connectors	No outputs	No outputs
7.1 channel HD audio on HDMI
DisplayPort Multimode (DP++) support		Up to 3840x2160
eDP 1.2 signal support		Up to 3840x2160
HDCP content protection
HDMI
LVDS signal support		Up to 1920x1200
TrueHD and DTS-HD audio bitstreaming
VGA аnalog display support		Up to 2048x1536
Compatibility, dimensions and requirements
Interface	PCIe 3.0 x8	PCIe 3.0 x16
Bus support		PCI Express 3.0, PCI Express 2.0
Laptop size		medium sized
API support
DirectX	12.0 (11_0)	12 API
OpenGL	4.6	4.5
OpenCL		1.1
Memory
Maximum RAM amount	1 GB	2 GB
Memory bandwidth	16.02 GB / s	86.4 GB / s
Memory bus width	64 Bit	128 Bit
Memory clock speed	2002 MHz	5400 MHz
Memory type	DDR3	GDDR5
Shared memory		0
Standard memory configuration		GDDR5
Technologies
3D Vision
3D Vision / 3DTV Play
Blu-Ray 3D Support
CUDA
Direct Compute
FXAA
H.264, VC1, MPEG2 1080p video decoder
Optimus