Radeon HD 5770 vs Radeon R7 M260X

Intro

Compare all of that to the Radeon R7 M260X, which comes with GPU clock speed of 825 MHz, and 2048 MB of GDDR5 memory set to run at 1000 MHz through a 128-bit bus. It also is made up of 384 SPUs, 24 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 5770 should perform a bit faster than the Radeon R7 M260X overall. (explain)

Radeon HD 5770		76800 MB/sec
Radeon R7 M260X		64000 MB/sec
	Difference: 12800 (20%)

Texel Rate

The Radeon HD 5770 will be much (more or less 72%) more effective at texture filtering than the Radeon R7 M260X. (explain)

Radeon HD 5770		34000 Mtexels/sec
Radeon R7 M260X		19800 Mtexels/sec
	Difference: 14200 (72%)

Pixel Rate

The Radeon HD 5770 will be much (approximately 106%) faster with regards to anti-aliasing than the Radeon R7 M260X, and also should be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 5770		13600 Mpixels/sec
Radeon R7 M260X		6600 Mpixels/sec
	Difference: 7000 (106%)

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 maximum amount of information (counted in megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the 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 in one second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the video 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 the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines 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 rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.