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Nvidia Titan X vs Radeon HD 7990

Intro

The Nvidia Titan X features core clock speeds of 1417 MHz on the GPU, and 1251 MHz on the 12288 MB of GDDR5X memory. It features 3584 SPUs as well as 224 TAUs and 96 Rasterization Operator Units.

Compare those specs to the Radeon HD 7990, which makes use of a 28 nm design. AMD has set the core speed at 950 MHz. The GDDR5 memory runs at a frequency of 1500 MHz on this specific card. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Nvidia Titan X 250 Watts
Radeon HD 7990 375 Watts
Difference: 125 Watts (50%)

Memory Bandwidth

The Radeon HD 7990, in theory, should be just a bit faster than the Nvidia Titan X overall. (explain)

Radeon HD 7990 576000 MB/sec
Nvidia Titan X 491520 MB/sec
Difference: 84480 (17%)

Texel Rate

The Nvidia Titan X is quite a bit (approximately 31%) faster with regards to AF than the Radeon HD 7990. (explain)

Nvidia Titan X 317408 Mtexels/sec
Radeon HD 7990 243200 Mtexels/sec
Difference: 74208 (31%)

Pixel Rate

If running with high levels of AA is important to you, then the Nvidia Titan X is the winner, and very much so. (explain)

Nvidia Titan X 136032 Mpixels/sec
Radeon HD 7990 60800 Mpixels/sec
Difference: 75232 (124%)

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

Check prices at:

Radeon HD 7990

Amazon.com

Check prices at:

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 HD 7990
Manufacturer nVidia AMD
Year August 2016 April 2013
Code Name GP102-400 Malta
Memory 12288 MB 3072 MB (x2)
Core Speed 1417 MHz 950 MHz (x2)
Memory Speed 10008 MHz 6000 MHz (x2)
Power (Max TDP) 250 watts 375 watts
Bandwidth 491520 MB/sec 576000 MB/sec
Texel Rate 317408 Mtexels/sec 243200 Mtexels/sec
Pixel Rate 136032 Mpixels/sec 60800 Mpixels/sec
Unified Shaders 3584 2048 (x2)
Texture Mapping Units 224 128 (x2)
Render Output Units 96 32 (x2)
Bus Type GDDR5X GDDR5
Bus Width 384-bit 384-bit (x2)
Fab Process 16 nm 28 nm
Transistors 12000 million 4313 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12.0 DirectX 11.1
OpenGL Version OpenGL 4.5 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of information (counted in megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 can be applied per second. This is worked out by multiplying the total number of texture units 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 processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate 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 rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

Nvidia Titan X

Amazon.com

Check prices at:

Radeon HD 7990

Amazon.com

Check prices at:

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.

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