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Radeon R5 M255 vs Radeon R9 M290X

Intro

The Radeon R5 M255 has a GPU core speed of 940 MHz, and the 2048 MB of DDR3 memory runs at 1000 MHz through a 64-bit bus. It also is made up of 320 SPUs, 20 TAUs, and 8 Raster Operation Units.

Compare those specifications to the Radeon R9 M290X, which features a clock frequency of 850 MHz and a GDDR5 memory speed of 1200 MHz. It also makes use of a 256-bit bus, and uses a 28 nm design. It is comprised of 1280 SPUs, 80 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon R9 M290X should perform quite a bit faster than the Radeon R5 M255 overall. (explain)

Radeon R9 M290X 153600 MB/sec
Radeon R5 M255 16000 MB/sec
Difference: 137600 (860%)

Texel Rate

The Radeon R9 M290X will be much (approximately 262%) faster with regards to AF than the Radeon R5 M255. (explain)

Radeon R9 M290X 68000 Mtexels/sec
Radeon R5 M255 18800 Mtexels/sec
Difference: 49200 (262%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 M290X is a better choice, and very much so. (explain)

Radeon R9 M290X 27200 Mpixels/sec
Radeon R5 M255 7520 Mpixels/sec
Difference: 19680 (262%)

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 M290X

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 M290X
Manufacturer AMD AMD
Year June 2014 May 1 2014
Code Name Jet Pro Neptune XT
Memory 2048 MB 4096 MB
Core Speed 940 MHz 850 MHz
Memory Speed 2000 MHz 4800 MHz
Power (Max TDP) (Unknown) watts 100 watts
Bandwidth 16000 MB/sec 153600 MB/sec
Texel Rate 18800 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 7520 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 320 1280
Texture Mapping Units 20 80
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 11.2
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in MB per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the bus width by the speed of its memory. If the card has DDR memory, it must 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 AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total number 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 applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

Radeon R5 M255

Amazon.com

Check prices at:

Radeon R9 M290X

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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