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Nvidia Titan X vs Radeon HD 7990

Intro

The Nvidia Titan X has a core clock frequency of 1417 MHz and a GDDR5X memory frequency of 1251 MHz. It also features a 384-bit memory bus, and uses a 16 nm design. It features 3584 SPUs, 224 Texture Address Units, and 96 ROPs.

Compare those specs to the Radeon HD 7990, which has a core clock frequency of 950 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 384-bit bus, and uses a 28 nm design. It is made up of 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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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

Performance-wise, the Radeon HD 7990 should in theory be a little bit better 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 should be a lot (approximately 31%) faster with regards to anisotropic filtering 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, by far. (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: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 processed in one second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach 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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