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GeForce GTX 780 Ti vs Radeon HD 6990

Intro

The GeForce GTX 780 Ti comes with a GPU clock speed of 875 MHz, and the 3072 MB of GDDR5 memory is set to run at 1750 MHz through a 384-bit bus. It also is made up of 2880 Stream Processors, 240 Texture Address Units, and 48 ROPs.

Compare all of that to the Radeon HD 6990, which uses a 40 nm design. AMD has clocked the core frequency at 830 MHz. The GDDR5 memory is set to run at a speed of 1250 MHz on this specific card. It features 1536 SPUs as well as 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 780 Ti 10900 points
Radeon HD 6990 5820 points
Difference: 5080 (87%)

Ethereum Mining Hash Rate

Radeon HD 6990 24 Mh/s
GeForce GTX 780 Ti 19 Mh/s
Difference: 5 (26%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 780 Ti 250 Watts
Radeon HD 6990 375 Watts
Difference: 125 Watts (50%)

Memory Bandwidth

In theory, the GeForce GTX 780 Ti will be 5% quicker than the Radeon HD 6990 overall, due to its greater bandwidth. (explain)

GeForce GTX 780 Ti 336000 MB/sec
Radeon HD 6990 320000 MB/sec
Difference: 16000 (5%)

Texel Rate

The GeForce GTX 780 Ti will be a lot (approximately 32%) faster with regards to texture filtering than the Radeon HD 6990. (explain)

GeForce GTX 780 Ti 210000 Mtexels/sec
Radeon HD 6990 159360 Mtexels/sec
Difference: 50640 (32%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 6990 is a better choice, by a large margin. (explain)

Radeon HD 6990 53120 Mpixels/sec
GeForce GTX 780 Ti 42000 Mpixels/sec
Difference: 11120 (26%)

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 780 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.

Specifications

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Model GeForce GTX 780 Ti Radeon HD 6990
Manufacturer nVidia AMD
Year November 2013 March 2011
Code Name GK110 Antilles
Memory 3072 MB 2048 MB (x2)
Core Speed 875 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 210000 Mtexels/sec 159360 Mtexels/sec
Pixel Rate 42000 Mpixels/sec 53120 Mpixels/sec
Unified Shaders 2880 1536 (x2)
Texture Mapping Units 240 96 (x2)
Render Output Units 48 32 (x2)
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit (x2)
Fab Process 28 nm 40 nm
Transistors 7080 million 2640 million
Bus PCIe 3.0 x16 PCIe 2.1 x16
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.4 OpenGL 4.1

Memory Bandwidth: Bandwidth is the largest amount of data (counted in megabytes per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better 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 number of texture map elements (texels) that are applied 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 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 most pixels the video card can possibly write 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 the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GTX 780 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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