Radeon HD 5870 vs Radeon R7 M260

Intro

Compare all of that to the Radeon R7 M260, which comes with a core clock frequency of 715 MHz and a DDR3 memory speed of 1000 MHz. It also uses a 64-bit memory bus, and uses a 28 nm design. It features 384 SPUs, 24 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon HD 5870 should in theory be quite a bit superior to the Radeon R7 M260 in general. (explain)

Radeon HD 5870		153600 MB/sec
Radeon R7 M260		16000 MB/sec
	Difference: 137600 (860%)

Texel Rate

The Radeon HD 5870 should be a lot (about 296%) faster with regards to anisotropic filtering than the Radeon R7 M260. (explain)

Radeon HD 5870		68000 Mtexels/sec
Radeon R7 M260		17160 Mtexels/sec
	Difference: 50840 (296%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 5870 is a better choice, by a large margin. (explain)

Radeon HD 5870		27200 Mpixels/sec
Radeon R7 M260		5720 Mpixels/sec
	Difference: 21480 (376%)

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 data (counted in megabytes per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's 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 texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the card's 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 rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.