GeForce GTX 580 vs Radeon R9 390 8G

Intro

Compare those specifications to the Radeon R9 390 8G, which features GPU clock speed of 1000 MHz, and 8192 MB of GDDR5 memory running at 1500 MHz through a 512-bit bus. It also features 2560 Stream Processors, 160 Texture Address Units, and 64 ROPs.

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 390 8G		12733 points
GeForce GTX 580		4956 points
	Difference: 7777 (157%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 580		244 Watts
Radeon R9 390 8G		275 Watts
	Difference: 31 Watts (13%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390 8G should be 100% quicker than the GeForce GTX 580 in general, due to its higher data rate. (explain)

Radeon R9 390 8G		384000 MB/sec
GeForce GTX 580		192384 MB/sec
	Difference: 191616 (100%)

Texel Rate

The Radeon R9 390 8G should be a lot (about 224%) more effective at AF than the GeForce GTX 580. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
GeForce GTX 580		49408 Mtexels/sec
	Difference: 110592 (224%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 390 8G is superior to the GeForce GTX 580, by far. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
GeForce GTX 580		37056 Mpixels/sec
	Difference: 26944 (73%)

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 max amount of information (counted in megabytes per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number 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 is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.