Radeon R9 295X2 vs Radeon R9 M265X

Intro

Compare those specs to the Radeon R9 M265X, which has GPU clock speed of 575 MHz, and 2048 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also is made up of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 295X2 is 789% quicker than the Radeon R9 M265X overall, because of its greater bandwidth. (explain)

Radeon R9 295X2		640000 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 568000 (789%)

Texel Rate

The Radeon R9 295X2 will be much (more or less 1458%) more effective at AF than the Radeon R9 M265X. (explain)

Radeon R9 295X2		358336 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 335336 (1458%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R9 295X2 is superior to the Radeon R9 M265X, by a large margin. (explain)

Radeon R9 295X2		130304 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 121104 (1316%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the largest amount of data (measured in MB per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the 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 can be applied in one second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.