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Radeon R5 M255 vs Radeon R9 M395X

Intro

The Radeon R5 M255 comes with core speeds of 940 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 320 SPUs along with 20 Texture Address Units and 8 Rasterization Operator Units.

Compare those specifications to the Radeon R9 M395X, which has core speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 M395X should be 900% faster than the Radeon R5 M255 overall, because of its greater bandwidth. (explain)

Radeon R9 M395X 160000 MB/sec
Radeon R5 M255 16000 MB/sec
Difference: 144000 (900%)

Texel Rate

The Radeon R9 M395X should be quite a bit (approximately 392%) faster with regards to anisotropic filtering than the Radeon R5 M255. (explain)

Radeon R9 M395X 92544 Mtexels/sec
Radeon R5 M255 18800 Mtexels/sec
Difference: 73744 (392%)

Pixel Rate

The Radeon R9 M395X should be much (approximately 208%) faster with regards to FSAA than the Radeon R5 M255, and also will be able to handle higher resolutions better. (explain)

Radeon R9 M395X 23136 Mpixels/sec
Radeon R5 M255 7520 Mpixels/sec
Difference: 15616 (208%)

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 R9 M395X

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 R9 M395X
Manufacturer AMD AMD
Year June 2014 2015
Code Name Jet Pro Tonga
Memory 2048 MB 4096 MB
Core Speed 940 MHz 723 MHz
Memory Speed 2000 MHz 5000 MHz
Power (Max TDP) (Unknown) watts 125 watts
Bandwidth 16000 MB/sec 160000 MB/sec
Texel Rate 18800 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 7520 Mpixels/sec 23136 Mpixels/sec
Unified Shaders 320 2048
Texture Mapping Units 20 128
Render Output Units 8 32
Bus Type DDR3 GDDR5
Bus Width 64-bit 256-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 3.0 x8 PCIe 3.0 x16
DirectX Version DirectX 11.2 DirectX 12
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved past the external memory interface within a second. It's calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 again. If it uses 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher 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 the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon R5 M255

Amazon.com

Check prices at:

Radeon R9 M395X

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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