GeForce GTX 580 vs Radeon R9 285

Intro

Compare all that to the Radeon R9 285, which features core speeds of 918 MHz on the GPU, and 1375 MHz on the 2048 MB of GDDR5 memory. It features 1792 SPUs along with 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

Performance-wise, the GeForce GTX 580 should in theory be a bit better than the Radeon R9 285 overall. (explain)

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

Texel Rate

The Radeon R9 285 should be quite a bit (approximately 108%) more effective at texture 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 quite a bit (approximately 26%) better at full screen anti-aliasing than the Radeon R9 285, and should be able to handle higher resolutions without losing too much performance. (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 data (counted in MB per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range 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 worked out by multiplying the total number of texture units of the card 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 in a second.

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