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GeForce 940M vs Radeon R5 M255

Intro

The GeForce 940M uses a 28 nm design. nVidia has set the core speed at 1072 MHz. The DDR3 memory is set to run at a speed of 1000 MHz on this specific card. It features 384 SPUs as well as 24 Texture Address Units and 8 Rasterization Operator Units.

Compare all of that to the Radeon R5 M255, which features clock speeds of 940 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 320 SPUs as well as 20 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Both cards have the exact same bandwidth, so theoretically they should have the same performance. (explain)

Texel Rate

The GeForce 940M will be much (approximately 37%) faster with regards to AF than the Radeon R5 M255. (explain)

GeForce 940M 25728 Mtexels/sec
Radeon R5 M255 18800 Mtexels/sec
Difference: 6928 (37%)

Pixel Rate

The GeForce 940M will be a small bit (approximately 14%) more effective at FSAA than the Radeon R5 M255, and capable of handling higher screen resolutions more effectively. (explain)

GeForce 940M 8576 Mpixels/sec
Radeon R5 M255 7520 Mpixels/sec
Difference: 1056 (14%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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GeForce 940M

Amazon.com

Check prices at:

Radeon R5 M255

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce 940M Radeon R5 M255
Manufacturer nVidia AMD
Year March 12 2015 June 2014
Code Name GM108 Jet Pro
Memory 2048 MB 2048 MB
Core Speed 1072 MHz 940 MHz
Memory Speed 2000 MHz 2000 MHz
Power (Max TDP) (Unknown) watts (Unknown) watts
Bandwidth 16000 MB/sec 16000 MB/sec
Texel Rate 25728 Mtexels/sec 18800 Mtexels/sec
Pixel Rate 8576 Mpixels/sec 7520 Mpixels/sec
Unified Shaders 384 320
Texture Mapping Units 24 20
Render Output Units 8 8
Bus Type DDR3 DDR3
Bus Width 64-bit 64-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x8
DirectX Version DirectX 12 DirectX 11.2
OpenGL Version OpenGL 4.5 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of information (counted in megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce 940M

Amazon.com

Check prices at:

Radeon R5 M255

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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