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Radeon R5 M255 vs Radeon R7 250X 2GB

Intro

The Radeon R5 M255 features a GPU core speed of 940 MHz, and the 2048 MB of DDR3 RAM runs at 1000 MHz through a 64-bit bus. It also is made up of 320 Stream Processors, 20 Texture Address Units, and 8 Raster Operation Units.

Compare all of that to the Radeon R7 250X 2GB, which features a core clock frequency of 1000 MHz and a GDDR5 memory speed of 1125 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R7 250X 2GB, in theory, should perform much faster than the Radeon R5 M255 overall. (explain)

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

Texel Rate

The Radeon R7 250X 2GB is much (about 113%) more effective at AF than the Radeon R5 M255. (explain)

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

Pixel Rate

If running with a high resolution is important to you, then the Radeon R7 250X 2GB is a better choice, and very much so. (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 max amount of information (in units of MB per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the video card will be at 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 card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the 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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