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GeForce GTX Titan X vs Radeon HD 7990

Intro

The GeForce GTX Titan X uses a 28 nm design. nVidia has set the core speed at 1000 MHz. The GDDR5 RAM runs at a frequency of 1750 MHz on this particular card. It features 3072 SPUs along with 192 Texture Address Units and 96 ROPs.

Compare that to the Radeon HD 7990, which features GPU clock speed of 950 MHz, and 3072 MB of GDDR5 RAM set to run at 1500 MHz through a 384-bit bus. It also features 2048 Stream Processors, 128 TAUs, and 32 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX Titan X 17879 points
Radeon HD 7990 15520 points
Difference: 2359 (15%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically speaking, the Radeon HD 7990 is 71% quicker than the GeForce GTX Titan X overall, because of its higher bandwidth. (explain)

Radeon HD 7990 576000 MB/sec
GeForce GTX Titan X 336000 MB/sec
Difference: 240000 (71%)

Texel Rate

The Radeon HD 7990 is quite a bit (about 27%) better at texture filtering than the GeForce GTX Titan X. (explain)

Radeon HD 7990 243200 Mtexels/sec
GeForce GTX Titan X 192000 Mtexels/sec
Difference: 51200 (27%)

Pixel Rate

The GeForce GTX Titan X will be quite a bit (about 58%) more effective at anti-aliasing than the Radeon HD 7990, and also capable of handling higher resolutions more effectively. (explain)

GeForce GTX Titan X 96000 Mpixels/sec
Radeon HD 7990 60800 Mpixels/sec
Difference: 35200 (58%)

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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GeForce GTX 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 GeForce GTX Titan X Radeon HD 7990
Manufacturer nVidia AMD
Year March 2015 April 2013
Code Name GM200 Malta
Memory 12288 MB 3072 MB (x2)
Core Speed 1000 MHz 950 MHz (x2)
Memory Speed 7000 MHz 6000 MHz (x2)
Power (Max TDP) 250 watts 375 watts
Bandwidth 336000 MB/sec 576000 MB/sec
Texel Rate 192000 Mtexels/sec 243200 Mtexels/sec
Pixel Rate 96000 Mpixels/sec 60800 Mpixels/sec
Unified Shaders 3072 2048 (x2)
Texture Mapping Units 192 128 (x2)
Render Output Units 96 32 (x2)
Bus Type GDDR5 GDDR5
Bus Width 384-bit 384-bit (x2)
Fab Process 28 nm 28 nm
Transistors 8000 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 max amount of information (measured in megabytes per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 are processed in one 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 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 the graphics card could possibly record to its local memory in one 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 - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill 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 reach the maximum fill rate.

Display Prices

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GeForce GTX 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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