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GeForce 920M vs Radeon R5 M255

Intro

The GeForce 920M uses a 28 nm design. nVidia has clocked the core frequency at 954 MHz. The DDR3 memory is set to run at a speed of 900 MHz on this card. It features 384 SPUs as well as 32 Texture Address Units and 8 Rasterization Operator Units.

Compare those specs to the Radeon R5 M255, which makes use of a 28 nm design. AMD has set the core speed at 940 MHz. The DDR3 memory works at a speed of 1000 MHz on this particular card. It features 320 SPUs along with 20 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R5 M255 should be 11% quicker than the GeForce 920M overall, due to its greater bandwidth. (explain)

Radeon R5 M255 16000 MB/sec
GeForce 920M 14400 MB/sec
Difference: 1600 (11%)

Texel Rate

The GeForce 920M will be quite a bit (about 62%) faster with regards to texture filtering than the Radeon R5 M255. (explain)

GeForce 920M 30528 Mtexels/sec
Radeon R5 M255 18800 Mtexels/sec
Difference: 11728 (62%)

Pixel Rate

The GeForce 920M should be a bit (more or less 1%) faster with regards to full screen anti-aliasing than the Radeon R5 M255, and should be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce 920M 7632 Mpixels/sec
Radeon R5 M255 7520 Mpixels/sec
Difference: 112 (1%)

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 920M

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 920M Radeon R5 M255
Manufacturer nVidia AMD
Year March 12 2015 June 2014
Code Name GK208 Jet Pro
Memory 2048 MB 2048 MB
Core Speed 954 MHz 940 MHz
Memory Speed 1800 MHz 2000 MHz
Power (Max TDP) (Unknown) watts (Unknown) watts
Bandwidth 14400 MB/sec 16000 MB/sec
Texel Rate 30528 Mtexels/sec 18800 Mtexels/sec
Pixel Rate 7632 Mpixels/sec 7520 Mpixels/sec
Unified Shaders 384 320
Texture Mapping Units 32 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 (measured in megabytes per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce 920M

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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