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Geforce GTX 1080 Ti vs Radeon HD 7990

Intro

The Geforce GTX 1080 Ti features a GPU core clock speed of 1480 MHz, and the 11264 MB of GDDR5X RAM runs at 1376 MHz through a 352-bit bus. It also is made up of 3584 SPUs, 224 Texture Address Units, and 88 Raster Operation Units.

Compare all that to the Radeon HD 7990, which features core speeds of 950 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 RAM. It features 2048 SPUs as well as 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 1080 Ti 27629 points
Radeon HD 7990 15520 points
Difference: 12109 (78%)

Zcash Mining Hash Rate

Geforce GTX 1080 Ti 710 Sol/s
Radeon HD 7990 513 Sol/s
Difference: 197 (38%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 1080 Ti 250 Watts
Radeon HD 7990 375 Watts
Difference: 125 Watts (50%)

Memory Bandwidth

Theoretically, the Radeon HD 7990 should perform a little bit faster than the Geforce GTX 1080 Ti overall. (explain)

Radeon HD 7990 576000 MB/sec
Geforce GTX 1080 Ti 495616 MB/sec
Difference: 80384 (16%)

Texel Rate

The Geforce GTX 1080 Ti will be quite a bit (approximately 36%) faster with regards to texture filtering than the Radeon HD 7990. (explain)

Geforce GTX 1080 Ti 331520 Mtexels/sec
Radeon HD 7990 243200 Mtexels/sec
Difference: 88320 (36%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Geforce GTX 1080 Ti is a better choice, and very much so. (explain)

Geforce GTX 1080 Ti 130240 Mpixels/sec
Radeon HD 7990 60800 Mpixels/sec
Difference: 69440 (114%)

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 1080 Ti

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 1080 Ti Radeon HD 7990
Manufacturer nVidia AMD
Year March 2017 April 2013
Code Name GP102 Malta
Memory 11264 MB 3072 MB (x2)
Core Speed 1480 MHz 950 MHz (x2)
Memory Speed 11008 MHz 6000 MHz (x2)
Power (Max TDP) 250 watts 375 watts
Bandwidth 495616 MB/sec 576000 MB/sec
Texel Rate 331520 Mtexels/sec 243200 Mtexels/sec
Pixel Rate 130240 Mpixels/sec 60800 Mpixels/sec
Unified Shaders 3584 2048 (x2)
Texture Mapping Units 224 128 (x2)
Render Output Units 88 32 (x2)
Bus Type GDDR5X GDDR5
Bus Width 352-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 max amount of information (counted in megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 figure is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core 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 - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Geforce GTX 1080 Ti

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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