GeForce GTX 580 vs Radeon R9 285

Intro

Compare that to the Radeon R9 285, which uses a 28 nm design. AMD has clocked the core frequency at 918 MHz. The GDDR5 RAM is set to run at a speed of 1375 MHz on this specific model. It features 1792 SPUs as well as 112 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R9 285		8500 points
GeForce GTX 580		4956 points
	Difference: 3544 (72%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 285		190 Watts
GeForce GTX 580		244 Watts
	Difference: 54 Watts (28%)

Memory Bandwidth

The GeForce GTX 580 should in theory be a little bit faster than the Radeon R9 285 in general. (explain)

GeForce GTX 580		192384 MB/sec
Radeon R9 285		176000 MB/sec
	Difference: 16384 (9%)

Texel Rate

The Radeon R9 285 is quite a bit (more or less 108%) better at anisotropic filtering than the GeForce GTX 580. (explain)

Radeon R9 285		102816 Mtexels/sec
GeForce GTX 580		49408 Mtexels/sec
	Difference: 53408 (108%)

Pixel Rate

The GeForce GTX 580 is much (more or less 26%) faster with regards to full screen anti-aliasing than the Radeon R9 285, and will be capable of handling higher resolutions more effectively. (explain)

GeForce GTX 580		37056 Mpixels/sec
Radeon R9 285		29376 Mpixels/sec
	Difference: 7680 (26%)

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 information (in units of megabytes per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.