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GeForce GTX 550 Ti vs Radeon HD 6990

Intro

The GeForce GTX 550 Ti uses a 40 nm design. nVidia has set the core frequency at 900 MHz. The GDDR5 memory is set to run at a frequency of 1026 MHz on this particular model. It features 192 SPUs as well as 32 Texture Address Units and 24 ROPs.

Compare those specs to the Radeon HD 6990, which features a GPU core clock speed of 830 MHz, and 2048 MB of GDDR5 memory set to run at 1250 MHz through a 256-bit bus. It also is made up of 1536 SPUs, 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

Radeon HD 6990 5820 points
GeForce GTX 550 Ti 1897 points
Difference: 3923 (207%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 550 Ti 116 Watts
Radeon HD 6990 375 Watts
Difference: 259 Watts (223%)

Memory Bandwidth

In theory, the Radeon HD 6990 should be a lot faster than the GeForce GTX 550 Ti in general. (explain)

Radeon HD 6990 320000 MB/sec
GeForce GTX 550 Ti 98496 MB/sec
Difference: 221504 (225%)

Texel Rate

The Radeon HD 6990 will be quite a bit (more or less 453%) faster with regards to AF than the GeForce GTX 550 Ti. (explain)

Radeon HD 6990 159360 Mtexels/sec
GeForce GTX 550 Ti 28800 Mtexels/sec
Difference: 130560 (453%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6990 is the winner, by far. (explain)

Radeon HD 6990 53120 Mpixels/sec
GeForce GTX 550 Ti 21600 Mpixels/sec
Difference: 31520 (146%)

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 550 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 550 Ti Radeon HD 6990
Manufacturer nVidia AMD
Year March 2011 March 2011
Code Name GF116 Antilles
Memory 1024 MB 2048 MB (x2)
Core Speed 900 MHz 830 MHz (x2)
Memory Speed 4104 MHz 5000 MHz (x2)
Power (Max TDP) 116 watts 375 watts
Bandwidth 98496 MB/sec 320000 MB/sec
Texel Rate 28800 Mtexels/sec 159360 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 53120 Mpixels/sec
Unified Shaders 192 1536 (x2)
Texture Mapping Units 32 96 (x2)
Render Output Units 24 32 (x2)
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit (x2)
Fab Process 40 nm 40 nm
Transistors 1170 million 2640 million
Bus PCIe 2.1 x16 PCIe 2.1 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total number of texture units of the card by the core clock 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GTX 550 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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