Radeon HD 4790 vs Radeon R7 M260

Intro

Compare those specs to the Radeon R7 M260, which features a clock speed of 715 MHz and a DDR3 memory speed of 1000 MHz. It also features a 64-bit bus, and makes use of a 28 nm design. It is made up of 384 SPUs, 24 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 4790 should perform quite a bit faster than the Radeon R7 M260 in general. (explain)

Radeon HD 4790		102400 MB/sec
Radeon R7 M260		16000 MB/sec
	Difference: 86400 (540%)

Texel Rate

The Radeon HD 4790 will be just a bit (about 12%) more effective at texture filtering than the Radeon R7 M260. (explain)

Radeon HD 4790		19200 Mtexels/sec
Radeon R7 M260		17160 Mtexels/sec
	Difference: 2040 (12%)

Pixel Rate

The Radeon HD 4790 should be quite a bit (approximately 68%) better at AA than the Radeon R7 M260, and will be capable of handling higher resolutions more effectively. (explain)

Radeon HD 4790		9600 Mpixels/sec
Radeon R7 M260		5720 Mpixels/sec
	Difference: 3880 (68%)

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: Bandwidth is the maximum amount of information (in units of MB per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher 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 amount of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.