Radeon R7 260X vs Radeon R9 M270X

Intro

Compare that to the Radeon R9 M270X, which makes use of a 28 nm design. AMD has set the core speed at 725 MHz. The GDDR5 memory runs at a frequency of 1125 MHz on this card. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon R7 260X should in theory be a lot better than the Radeon R9 M270X overall. (explain)

Radeon R7 260X		104000 MB/sec
Radeon R9 M270X		72000 MB/sec
	Difference: 32000 (44%)

Texel Rate

The Radeon R7 260X should be much (about 112%) better at anisotropic filtering than the Radeon R9 M270X. (explain)

Radeon R7 260X		61600 Mtexels/sec
Radeon R9 M270X		29000 Mtexels/sec
	Difference: 32600 (112%)

Pixel Rate

The Radeon R7 260X will be much (approximately 52%) faster with regards to anti-aliasing than the Radeon R9 M270X, and capable of handling higher resolutions more effectively. (explain)

Radeon R7 260X		17600 Mpixels/sec
Radeon R9 M270X		11600 Mpixels/sec
	Difference: 6000 (52%)

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 (in units of MB per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's 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 processed per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of 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 rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.