GeForce GTX 580 vs Radeon R9 M395X

Intro

Compare all of that to the Radeon R9 M395X, which features clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X		125 Watts
GeForce GTX 580		244 Watts
	Difference: 119 Watts (95%)

Memory Bandwidth

The GeForce GTX 580 should theoretically be a bit faster than the Radeon R9 M395X overall. (explain)

GeForce GTX 580		192384 MB/sec
Radeon R9 M395X		160000 MB/sec
	Difference: 32384 (20%)

Texel Rate

The Radeon R9 M395X will be quite a bit (approximately 87%) faster with regards to anisotropic filtering than the GeForce GTX 580. (explain)

Radeon R9 M395X		92544 Mtexels/sec
GeForce GTX 580		49408 Mtexels/sec
	Difference: 43136 (87%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 580 is superior to the Radeon R9 M395X, by a large margin. (explain)

GeForce GTX 580		37056 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 13920 (60%)

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 (counted in MB per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If 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 in one second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.