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Nvidia Titan X vs Radeon R9 295X2

Intro

The Nvidia Titan X features a GPU core speed of 1417 MHz, and the 12288 MB of GDDR5X RAM runs at 1251 MHz through a 384-bit bus. It also features 3584 SPUs, 224 TAUs, and 96 Raster Operation Units.

Compare those specifications to the Radeon R9 295X2, which comes with GPU core speed of 1018 MHz, and 4096 MB of GDDR5 memory running at 1250 MHz through a 512-bit bus. It also is made up of 2816 Stream Processors, 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

Performance-wise, the Radeon R9 295X2 should theoretically be much superior to the Nvidia Titan X in general. (explain)

Radeon R9 295X2 640000 MB/sec
Nvidia Titan X 393216 MB/sec
Difference: 246784 (63%)

Texel Rate

The Radeon R9 295X2 will be just a bit (more or less 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

The Nvidia Titan X should be just a bit (about 4%) faster with regards to anti-aliasing than the Radeon R9 295X2, and also should be able to handle higher screen resolutions without slowing down too much. (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

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Nvidia Titan X

Amazon.com

Radeon R9 295X2

Amazon.com

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Nvidia Titan X Radeon R9 295X2
Manufacturer nVidia AMD
Year August 2016 April 2014
Code Name GP102-400 Vesuvius
Memory 12288 MB 4096 MB (x2)
Core Speed 1417 MHz 1018 MHz (x2)
Memory Speed 10008 MHz 5000 MHz (x2)
Power (Max TDP) 250 watts 500 watts
Bandwidth 393216 MB/sec 640000 MB/sec
Texel Rate 317408 Mtexels/sec 358336 Mtexels/sec
Pixel Rate 136032 Mpixels/sec 130304 Mpixels/sec
Unified Shaders 3584 2816 (x2)
Texture Mapping Units 224 176 (x2)
Render Output Units 96 64 (x2)
Bus Type GDDR5X GDDR5
Bus Width 384-bit 512-bit (x2)
Fab Process 16 nm 28 nm
Transistors 12000 million 6200 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12.0 DirectX 11.2
OpenGL Version OpenGL 4.5 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. 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 texture map elements (texels) that can be processed per 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 higher this number, the better the graphics card will be at handling 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 per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

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