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GeForce GTX Titan vs Radeon HD 6990

Intro

The GeForce GTX Titan has a GPU clock speed of 837 MHz, and the 6144 MB of GDDR5 memory runs at 1502 MHz through a 384-bit bus. It also is made up of 2688 SPUs, 224 TAUs, and 48 Raster Operation Units.

Compare those specifications to the Radeon HD 6990, which uses a 40 nm design. AMD has set the core frequency at 830 MHz. The GDDR5 memory is set to run at a speed of 1250 MHz on this card. It features 1536 SPUs as well as 96 TAUs and 32 Rasterization Operator 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 Titan 10162 points
Radeon HD 6990 5820 points
Difference: 4342 (75%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically, the Radeon HD 6990 should be a small bit faster than the GeForce GTX Titan overall. (explain)

Radeon HD 6990 320000 MB/sec
GeForce GTX Titan 288384 MB/sec
Difference: 31616 (11%)

Texel Rate

The GeForce GTX Titan is just a bit (more or less 18%) more effective at texture filtering than the Radeon HD 6990. (explain)

GeForce GTX Titan 187488 Mtexels/sec
Radeon HD 6990 159360 Mtexels/sec
Difference: 28128 (18%)

Pixel Rate

The Radeon HD 6990 should be a lot (approximately 32%) faster with regards to full screen anti-aliasing than the GeForce GTX Titan, and also able to handle higher resolutions better. (explain)

Radeon HD 6990 53120 Mpixels/sec
GeForce GTX Titan 40176 Mpixels/sec
Difference: 12944 (32%)

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 Titan

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 Titan Radeon HD 6990
Manufacturer nVidia AMD
Year February 2013 March 2011
Code Name GK110 Antilles
Memory 6144 MB 2048 MB (x2)
Core Speed 837 MHz 830 MHz (x2)
Memory Speed 6008 MHz 5000 MHz (x2)
Power (Max TDP) 250 watts 375 watts
Bandwidth 288384 MB/sec 320000 MB/sec
Texel Rate 187488 Mtexels/sec 159360 Mtexels/sec
Pixel Rate 40176 Mpixels/sec 53120 Mpixels/sec
Unified Shaders 2688 1536 (x2)
Texture Mapping Units 224 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 4.3 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of data (counted in megabytes per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 number of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of 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 Titan

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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