Geforce GTX 690 vs Radeon R9 M395X

Intro

Compare all of that to the Radeon R9 M395X, which has a GPU core clock speed of 723 MHz, and 4096 MB of GDDR5 RAM running at 1250 MHz through a 256-bit bus. It also features 2048 Stream Processors, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X		125 Watts
Geforce GTX 690		300 Watts
	Difference: 175 Watts (140%)

Memory Bandwidth

In theory, the Geforce GTX 690 will be 140% faster than the Radeon R9 M395X overall, because of its higher bandwidth. (explain)

Geforce GTX 690		384512 MB/sec
Radeon R9 M395X		160000 MB/sec
	Difference: 224512 (140%)

Texel Rate

The Geforce GTX 690 will be quite a bit (about 153%) better at anisotropic filtering than the Radeon R9 M395X. (explain)

Geforce GTX 690		234240 Mtexels/sec
Radeon R9 M395X		92544 Mtexels/sec
	Difference: 141696 (153%)

Pixel Rate

The Geforce GTX 690 should be quite a bit (more or less 153%) better at anti-aliasing than the Radeon R9 M395X, and will be capable of handling higher resolutions more effectively. (explain)

Geforce GTX 690		58560 Mpixels/sec
Radeon R9 M395X		23136 Mpixels/sec
	Difference: 35424 (153%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If 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, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.