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Radeon R5 M255 vs Radeon R7 250X 2GB

Intro

The Radeon R5 M255 has core clock speeds of 940 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 320 SPUs along with 20 TAUs and 8 ROPs.

Compare all of that to the Radeon R7 250X 2GB, which features a GPU core clock speed of 1000 MHz, and 2048 MB of GDDR5 RAM set to run at 1125 MHz through a 128-bit bus. It also is made up of 640 SPUs, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R7 250X 2GB is 350% faster than the Radeon R5 M255 overall, due to its higher data rate. (explain)

Radeon R7 250X 2GB 72000 MB/sec
Radeon R5 M255 16000 MB/sec
Difference: 56000 (350%)

Texel Rate

The Radeon R7 250X 2GB should be a lot (about 113%) more effective at anisotropic filtering than the Radeon R5 M255. (explain)

Radeon R7 250X 2GB 40000 Mtexels/sec
Radeon R5 M255 18800 Mtexels/sec
Difference: 21200 (113%)

Pixel Rate

The Radeon R7 250X 2GB is quite a bit (approximately 113%) more effective at anti-aliasing than the Radeon R5 M255, and able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R7 250X 2GB 16000 Mpixels/sec
Radeon R5 M255 7520 Mpixels/sec
Difference: 8480 (113%)

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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Radeon R5 M255

Amazon.com

Check prices at:

Radeon R7 250X 2GB

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 Radeon R5 M255 Radeon R7 250X 2GB
Manufacturer AMD AMD
Year June 2014 February 2014
Code Name Jet Pro Cape Verde XT
Memory 2048 MB 2048 MB
Core Speed 940 MHz 1000 MHz
Memory Speed 2000 MHz 4500 MHz
Power (Max TDP) (Unknown) watts 95 watts
Bandwidth 16000 MB/sec 72000 MB/sec
Texel Rate 18800 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 7520 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 320 640
Texture Mapping Units 20 40
Render Output Units 8 16
Bus Type DDR3 GDDR5
Bus Width 64-bit 128-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million 1500 million
Bus PCIe 3.0 x8 PCIe 3.0 x16
DirectX Version DirectX 11.2 DirectX 11.2
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in MB per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon R5 M255

Amazon.com

Check prices at:

Radeon R7 250X 2GB

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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