NVIDIA GeForce 840A vs AMD Radeon R9 M275

Comparative analysis of NVIDIA GeForce 840A and AMD Radeon R9 M275 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 - 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).

NVIDIA GeForce 840A

AMD Radeon R9 M275

Differences

Reasons to consider the NVIDIA GeForce 840A

Videocard is newer: launch date 1 month(s) later
Around 14% higher core clock speed: 1029 MHz vs 900 MHz
Around 22% higher boost clock speed: 1124 MHz vs 925 MHz
Around 1% better performance in PassMark - G3D Mark: 1123 vs 1115
Around 99% better performance in GFXBench 4.0 - Manhattan (Frames): 2314 vs 1162
Around 99% better performance in GFXBench 4.0 - Manhattan (Fps): 2314 vs 1162
Around 82% better performance in GFXBench 4.0 - T-Rex (Frames): 3117 vs 1717
Around 82% better performance in GFXBench 4.0 - T-Rex (Fps): 3117 vs 1717

Specifications (specs)
Launch date	17 March 2014 vs 28 January 2014
Core clock speed	1029 MHz vs 900 MHz
Boost clock speed	1124 MHz vs 925 MHz
Benchmarks
PassMark - G3D Mark	1123 vs 1115
GFXBench 4.0 - Manhattan (Frames)	2314 vs 1162
GFXBench 4.0 - Manhattan (Fps)	2314 vs 1162
GFXBench 4.0 - T-Rex (Frames)	3117 vs 1717
GFXBench 4.0 - T-Rex (Fps)	3117 vs 1717

Reasons to consider the AMD Radeon R9 M275

2.1x more texture fill rate: 37 GTexel / s vs 17.98 GTexel / s
Around 67% higher pipelines: 640 vs 384
Around 37% better floating-point performance: 1,184 gflops vs 863.2 gflops
2x more maximum memory size: 2 GB vs 1 GB
2x more memory clock speed: 4000 MHz vs 2002 MHz
2.6x better performance in PassMark - G2D Mark: 569 vs 221
Around 65% better performance in Geekbench - OpenCL: 9231 vs 5596

Specifications (specs)
Texture fill rate	37 GTexel / s vs 17.98 GTexel / s
Pipelines	640 vs 384
Floating-point performance	1,184 gflops vs 863.2 gflops
Maximum memory size	2 GB vs 1 GB
Memory clock speed	4000 MHz vs 2002 MHz
Benchmarks
PassMark - G2D Mark	569 vs 221
Geekbench - OpenCL	9231 vs 5596

Compare benchmarks

GPU 1: NVIDIA GeForce 840A
GPU 2: AMD Radeon R9 M275

PassMark - G3D Mark

GPU 1

GPU 2

1123

1115

PassMark - G2D Mark

GPU 1

GPU 2

221

569

Geekbench - OpenCL

GPU 1

GPU 2

5596

9231

GFXBench 4.0 - Manhattan (Frames)

GPU 1

GPU 2

2314

1162

GFXBench 4.0 - Manhattan (Fps)

GPU 1

GPU 2

2314

1162

GFXBench 4.0 - T-Rex (Frames)

GPU 1

GPU 2

3117

1717

GFXBench 4.0 - T-Rex (Fps)

GPU 1

GPU 2

3117

1717

Name	NVIDIA GeForce 840A	AMD Radeon R9 M275
PassMark - G3D Mark	1123	1115
PassMark - G2D Mark	221	569
Geekbench - OpenCL	5596	9231
GFXBench 4.0 - Car Chase Offscreen (Frames)	2188
GFXBench 4.0 - Car Chase Offscreen (Fps)	2188
GFXBench 4.0 - Manhattan (Frames)	2314	1162
GFXBench 4.0 - Manhattan (Fps)	2314	1162
GFXBench 4.0 - T-Rex (Frames)	3117	1717
GFXBench 4.0 - T-Rex (Fps)	3117	1717
CompuBench 1.5 Desktop - Face Detection (mPixels/s)		28.064
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)		313.463
CompuBench 1.5 Desktop - T-Rex (Frames/s)		2.206
CompuBench 1.5 Desktop - Video Composition (Frames/s)		34.381
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)		121.685

Compare specifications (specs)

	NVIDIA GeForce 840A	AMD Radeon R9 M275
Essentials
Architecture	Maxwell	GCN 1.0
Code name	GM108	Venus
Launch date	17 March 2014	28 January 2014
Place in performance rating	1003	1005
Type	Desktop	Laptop
Launch price (MSRP)		$799.99
Price now		$699.99
Value for money (0-100)		3.01
Technical info
Boost clock speed	1124 MHz	925 MHz
Core clock speed	1029 MHz	900 MHz
Floating-point performance	863.2 gflops	1,184 gflops
Manufacturing process technology	28 nm	28 nm
Pipelines	384	640
Texture fill rate	17.98 GTexel / s	37 GTexel / s
Thermal Design Power (TDP)	33 Watt
Transistor count		1,500 million
Video outputs and ports
Display Connectors	No outputs	No outputs
Compatibility, dimensions and requirements
Interface	PCIe 3.0 x8	PCIe 3.0 x16
Laptop size		large
API support
DirectX	12.0 (11_0)	12.0 (11_1)
OpenGL	4.6	4.5
Memory
Maximum RAM amount	1 GB	2 GB
Memory bandwidth	16.02 GB / s	64 GB / s
Memory bus width	64 Bit	128 Bit
Memory clock speed	2002 MHz	4000 MHz
Memory type	DDR3	GDDR5
Shared memory		0