GeForce GTX 580 vs Radeon R9 M395X

Intro

Compare those specs to the Radeon R9 M395X, which features GPU core speed of 723 MHz, and 4096 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also is made up of 2048 Stream Processors, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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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

Performance-wise, the GeForce GTX 580 should in theory be a small bit superior to the Radeon R9 M395X in general. (explain)

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

Texel Rate

The Radeon R9 M395X is much (approximately 87%) faster with regards to AF 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 far. (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 (measured in MB per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, 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 amount of texture map elements (texels) that are processed in one second. This is calculated by multiplying the total number of texture units 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 processed per second.

Pixel Rate: Pixel rate is the most 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 worked out 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 drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.