Nvidia Titan X vs Radeon R9 295X2

Intro

Compare all of that to the Radeon R9 295X2, which comes with a clock speed of 1018 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 512-bit memory bus, and makes use of a 28 nm design. It is comprised of 2816 SPUs, 176 Texture Address Units, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Nvidia Titan X		250 Watts
Radeon R9 295X2		500 Watts
	Difference: 250 Watts (100%)

Memory Bandwidth

In theory, the Radeon R9 295X2 is 30% faster than the Nvidia Titan X in general, because of its higher bandwidth. (explain)

Radeon R9 295X2		640000 MB/sec
Nvidia Titan X		491520 MB/sec
	Difference: 148480 (30%)

Texel Rate

The Radeon R9 295X2 will be a small bit (about 13%) faster with regards to anisotropic filtering than the Nvidia Titan X. (explain)

Radeon R9 295X2		358336 Mtexels/sec
Nvidia Titan X		317408 Mtexels/sec
	Difference: 40928 (13%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Nvidia Titan X is superior to the Radeon R9 295X2, though only just barely. (explain)

Nvidia Titan X		136032 Mpixels/sec
Radeon R9 295X2		130304 Mpixels/sec
	Difference: 5728 (4%)

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: Bandwidth is the max amount of data (measured in megabytes per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 number of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card 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 number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends 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 get to the maximum fill rate.