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Geforce GTX 680 vs Radeon HD 6990

Intro

The Geforce GTX 680 has a clock speed of 1006 MHz and a GDDR5 memory speed of 1502 MHz. It also uses a 256-bit bus, and makes use of a 28 nm design. It features 1536 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Compare those specs to the Radeon HD 6990, which comes with GPU clock speed of 830 MHz, and 2048 MB of GDDR5 RAM running at 1250 MHz through a 256-bit bus. It also is made up of 1536 SPUs, 96 Texture Address Units, and 32 Raster Operation Units.

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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 680 7650 points
Radeon HD 6990 5820 points
Difference: 1830 (31%)

Ethereum Mining Hash Rate

Radeon HD 6990 24 Mh/s
Geforce GTX 680 16 Mh/s
Difference: 8 (50%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 680 195 Watts
Radeon HD 6990 375 Watts
Difference: 180 Watts (92%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6990 should be much faster than the Geforce GTX 680 in general. (explain)

Radeon HD 6990 320000 MB/sec
Geforce GTX 680 192256 MB/sec
Difference: 127744 (66%)

Texel Rate

The Radeon HD 6990 will be quite a bit (about 24%) more effective at texture filtering than the Geforce GTX 680. (explain)

Radeon HD 6990 159360 Mtexels/sec
Geforce GTX 680 128768 Mtexels/sec
Difference: 30592 (24%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6990 is superior to the Geforce GTX 680, and very much so. (explain)

Radeon HD 6990 53120 Mpixels/sec
Geforce GTX 680 32192 Mpixels/sec
Difference: 20928 (65%)

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 680

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 680 Radeon HD 6990
Manufacturer nVidia AMD
Year March 2012 March 2011
Code Name GK104 Antilles
Memory 2048 MB 2048 MB (x2)
Core Speed 1006 MHz 830 MHz (x2)
Memory Speed 6008 MHz 5000 MHz (x2)
Power (Max TDP) 195 watts 375 watts
Bandwidth 192256 MB/sec 320000 MB/sec
Texel Rate 128768 Mtexels/sec 159360 Mtexels/sec
Pixel Rate 32192 Mpixels/sec 53120 Mpixels/sec
Unified Shaders 1536 1536 (x2)
Texture Mapping Units 128 96 (x2)
Render Output Units 32 32 (x2)
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit (x2)
Fab Process 28 nm 40 nm
Transistors 3540 million 2640 million
Bus PCIe 3.0 x16 PCIe 2.1 x16
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.2 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of information (in units of MB per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines 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 output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Geforce GTX 680

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.

Comments

One Response to “Geforce GTX 680 vs Radeon HD 6990”
Rechner neue Grafikkarte - netzwelt.de Forum says:

[...] leistungststark und verbraucht nicht so viel Strom. Hier habe ich noch eine seite zum vergleichen Geforce GTX 680 vs Radeon HD 6990 – Performance Comparison Benchmarks @ Hardware Compare Da gibts jede neue Grafikkarte. P.S. Die Grafikkarten sind teuer, sollten aber für nächste 2 [...]

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