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Radeon R5 M255 vs Radeon R9 270

Intro

The Radeon R5 M255 makes use of a 28 nm design. AMD has clocked the core speed at 940 MHz. The DDR3 memory is set to run at a frequency of 1000 MHz on this particular model. It features 320 SPUs along with 20 TAUs and 8 Rasterization Operator Units.

Compare those specifications to the Radeon R9 270, which features a clock frequency of 900 MHz and a GDDR5 memory speed of 1400 MHz. It also features a 256-bit bus, and uses a 28 nm design. It is made up of 1280 SPUs, 80 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 270 should be a lot faster than the Radeon R5 M255 overall. (explain)

Radeon R9 270 179200 MB/sec
Radeon R5 M255 16000 MB/sec
Difference: 163200 (1020%)

Texel Rate

The Radeon R9 270 will be quite a bit (approximately 283%) more effective at texture filtering than the Radeon R5 M255. (explain)

Radeon R9 270 72000 Mtexels/sec
Radeon R5 M255 18800 Mtexels/sec
Difference: 53200 (283%)

Pixel Rate

The Radeon R9 270 is much (more or less 283%) faster with regards to AA than the Radeon R5 M255, and also will be capable of handling higher resolutions better. (explain)

Radeon R9 270 28800 Mpixels/sec
Radeon R5 M255 7520 Mpixels/sec
Difference: 21280 (283%)

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

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Radeon R9 270

Amazon.com

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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 270
Manufacturer AMD AMD
Year June 2014 November 2013
Code Name Jet Pro Curacao Pro
Memory 2048 MB 2048 MB
Core Speed 940 MHz 900 MHz
Memory Speed 2000 MHz 5600 MHz
Power (Max TDP) (Unknown) watts 150 watts
Bandwidth 16000 MB/sec 179200 MB/sec
Texel Rate 18800 Mtexels/sec 72000 Mtexels/sec
Pixel Rate 7520 Mpixels/sec 28800 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 2800 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 largest amount of information (counted in megabytes per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka 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 bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Radeon R5 M255

Amazon.com

Check prices at:

Radeon R9 270

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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