Radeon HD 5870 vs Radeon R7 M260X

Intro

Compare those specifications to the Radeon R7 M260X, which has GPU core speed of 825 MHz, and 2048 MB of GDDR5 RAM running at 1000 MHz through a 128-bit bus. It also is comprised of 384 Stream Processors, 24 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 5870 should be a lot faster than the Radeon R7 M260X overall. (explain)

Radeon HD 5870		153600 MB/sec
Radeon R7 M260X		64000 MB/sec
	Difference: 89600 (140%)

Texel Rate

The Radeon HD 5870 will be a lot (about 243%) better at anisotropic filtering than the Radeon R7 M260X. (explain)

Radeon HD 5870		68000 Mtexels/sec
Radeon R7 M260X		19800 Mtexels/sec
	Difference: 48200 (243%)

Pixel Rate

The Radeon HD 5870 should be a lot (approximately 312%) more effective at AA than the Radeon R7 M260X, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 5870		27200 Mpixels/sec
Radeon R7 M260X		6600 Mpixels/sec
	Difference: 20600 (312%)

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 (in units of MB per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the interface width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.