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GeForce GTX 980 Ti vs Radeon HD 6990

Intro

The GeForce GTX 980 Ti features a GPU core speed of 1000 MHz, and the 6144 MB of GDDR5 memory is set to run at 1750 MHz through a 384-bit bus. It also is comprised of 2816 Stream Processors, 176 Texture Address Units, and 96 ROPs.

Compare those specifications to the Radeon HD 6990, which has core speeds of 830 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs along with 96 Texture Address Units 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 980 Ti 17120 points
Radeon HD 6990 5820 points
Difference: 11300 (194%)

Ethereum Mining Hash Rate

Radeon HD 6990 24 Mh/s
GeForce GTX 980 Ti 22 Mh/s
Difference: 2 (9%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980 Ti 250 Watts
Radeon HD 6990 375 Watts
Difference: 125 Watts (50%)

Memory Bandwidth

Theoretically, the GeForce GTX 980 Ti should be a bit faster than the Radeon HD 6990 in general. (explain)

GeForce GTX 980 Ti 336000 MB/sec
Radeon HD 6990 320000 MB/sec
Difference: 16000 (5%)

Texel Rate

The GeForce GTX 980 Ti is just a bit (about 10%) more effective at texture filtering than the Radeon HD 6990. (explain)

GeForce GTX 980 Ti 176000 Mtexels/sec
Radeon HD 6990 159360 Mtexels/sec
Difference: 16640 (10%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 980 Ti is the winner, by far. (explain)

GeForce GTX 980 Ti 96000 Mpixels/sec
Radeon HD 6990 53120 Mpixels/sec
Difference: 42880 (81%)

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 980 Ti

Amazon.com

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Radeon HD 6990

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 980 Ti Radeon HD 6990
Manufacturer nVidia AMD
Year June 2015 March 2011
Code Name GM200 Antilles
Memory 6144 MB 2048 MB (x2)
Core Speed 1000 MHz 830 MHz (x2)
Memory Speed 7000 MHz 5000 MHz (x2)
Power (Max TDP) 250 watts 375 watts
Bandwidth 336000 MB/sec 320000 MB/sec
Texel Rate 176000 Mtexels/sec 159360 Mtexels/sec
Pixel Rate 96000 Mpixels/sec 53120 Mpixels/sec
Unified Shaders 2816 1536 (x2)
Texture Mapping Units 176 96 (x2)
Render Output Units 96 32 (x2)
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit (x2)
Fab Process 28 nm 40 nm
Transistors 8000 million 2640 million
Bus PCIe 3.0 x16 PCIe 2.1 x16
DirectX Version DirectX 12.0 DirectX 11
OpenGL Version OpenGL 4.5 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in MB per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR RAM, 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 number of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount 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 output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce GTX 980 Ti

Amazon.com

Check prices at:

Radeon HD 6990

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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