GeForce GTX 580 3GB vs Radeon R9 M295X

Intro

Compare those specs to the Radeon R9 M295X, which makes use of a 28 nm design. AMD has set the core frequency at 750 MHz. The GDDR5 memory works at a frequency of 1375 MHz on this specific card. It features 2048 SPUs as well as 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
GeForce GTX 580 3GB		244 Watts
	Difference: 119 Watts (95%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 580 3GB should theoretically be just a bit better than the Radeon R9 M295X in general. (explain)

GeForce GTX 580 3GB		192384 MB/sec
Radeon R9 M295X		176000 MB/sec
	Difference: 16384 (9%)

Texel Rate

The Radeon R9 M295X should be a lot (more or less 94%) faster with regards to AF than the GeForce GTX 580 3GB. (explain)

Radeon R9 M295X		96000 Mtexels/sec
GeForce GTX 580 3GB		49408 Mtexels/sec
	Difference: 46592 (94%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 580 3GB is superior to the Radeon R9 M295X, by a large margin. (explain)

GeForce GTX 580 3GB		37056 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 13056 (54%)

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 max amount of data (measured in MB per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is calculated by multiplying the total amount of texture units of the card by the core clock 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 per second.

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