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Nvidia Titan X vs Radeon R9 295X2


Intro

The Nvidia Titan X uses a 16 nm design. nVidia has set the core speed at 1417 MHz. The GDDR5X RAM runs at a frequency of 1251 MHz on this model. It features 3584 SPUs along with 224 Texture Address Units and 96 Rasterization Operator Units.

Compare all that to the Radeon R9 295X2, which has GPU clock speed of 1018 MHz, and 4096 MB of GDDR5 RAM set to run at 1250 MHz through a 512-bit bus. It also features 2816 SPUs, 176 Texture Address Units, and 64 Raster Operation Units.

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 greater data rate. (explain)

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

Texel Rate

The Radeon R9 295X2 should be just a bit (about 13%) more effective at texture 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 using a high screen resolution is important to you, then the Nvidia Titan X is superior to the Radeon R9 295X2, but not by far. (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

Nvidia Titan X

Radeon R9 295X2

Specifications

Display 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 491520 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 maximum amount of data (counted in MB per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better 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 amount of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs 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 is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Nvidia Titan X

Radeon R9 295X2

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