GeForce GTX 580 3GB vs Radeon R7 240

Intro

Compare those specs to the Radeon R7 240, which comes with clock speeds of 730 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 memory. It features 320 SPUs as well as 20 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
GeForce GTX 580 3GB		244 Watts
	Difference: 214 Watts (713%)

Memory Bandwidth

Performance-wise, the GeForce GTX 580 3GB should in theory be a lot superior to the Radeon R7 240 overall. (explain)

GeForce GTX 580 3GB		192384 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 163584 (568%)

Texel Rate

The GeForce GTX 580 3GB will be quite a bit (more or less 238%) faster with regards to AF than the Radeon R7 240. (explain)

GeForce GTX 580 3GB		49408 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 34808 (238%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 580 3GB is a better choice, by a large margin. (explain)

GeForce GTX 580 3GB		37056 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 31216 (535%)

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 (measured in MB per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better 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 applied per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.