Radeon R7 260X vs Radeon R9 M265X

Intro

Compare those specifications to the Radeon R9 M265X, which comes with a GPU core clock speed of 575 MHz, and 2048 MB of GDDR5 RAM set to run at 1125 MHz through a 128-bit bus. It also features 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 R7 260X is 44% faster than the Radeon R9 M265X in general, because of its higher data rate. (explain)

Radeon R7 260X		104000 MB/sec
Radeon R9 M265X		72000 MB/sec
	Difference: 32000 (44%)

Texel Rate

The Radeon R7 260X should be much (more or less 168%) faster with regards to texture filtering than the Radeon R9 M265X. (explain)

Radeon R7 260X		61600 Mtexels/sec
Radeon R9 M265X		23000 Mtexels/sec
	Difference: 38600 (168%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R7 260X is superior to the Radeon R9 M265X, and very much so. (explain)

Radeon R7 260X		17600 Mpixels/sec
Radeon R9 M265X		9200 Mpixels/sec
	Difference: 8400 (91%)

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

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the bus width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 amount of texture map elements (texels) that are 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.