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GeForce GTX 460 2GB vs Radeon HD 6990

Intro

The GeForce GTX 460 2GB features a clock frequency of 675 MHz and a GDDR5 memory frequency of 900 MHz. It also features a 256-bit memory bus, and uses a 40 nm design. It features 336 SPUs, 56 TAUs, and 32 ROPs.

Compare those specifications to the Radeon HD 6990, which uses a 40 nm design. AMD has set the core speed at 830 MHz. The GDDR5 RAM is set to run at a frequency of 1250 MHz on this particular model. It features 1536 SPUs as well as 96 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 460 2GB 160 Watts
Radeon HD 6990 375 Watts
Difference: 215 Watts (134%)

Memory Bandwidth

Performance-wise, the Radeon HD 6990 should theoretically be quite a bit superior to the GeForce GTX 460 2GB overall. (explain)

Radeon HD 6990 320000 MB/sec
GeForce GTX 460 2GB 115200 MB/sec
Difference: 204800 (178%)

Texel Rate

The Radeon HD 6990 should be quite a bit (approximately 322%) better at AF than the GeForce GTX 460 2GB. (explain)

Radeon HD 6990 159360 Mtexels/sec
GeForce GTX 460 2GB 37800 Mtexels/sec
Difference: 121560 (322%)

Pixel Rate

The Radeon HD 6990 should be quite a bit (more or less 146%) better at full screen anti-aliasing than the GeForce GTX 460 2GB, and will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 6990 53120 Mpixels/sec
GeForce GTX 460 2GB 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 460 2GB

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 460 2GB Radeon HD 6990
Manufacturer nVidia AMD
Year July 2010 March 2011
Code Name GF104 Antilles
Memory 2048 MB 2048 MB (x2)
Core Speed 675 MHz 830 MHz (x2)
Memory Speed 3600 MHz 5000 MHz (x2)
Power (Max TDP) 160 watts 375 watts
Bandwidth 115200 MB/sec 320000 MB/sec
Texel Rate 37800 Mtexels/sec 159360 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 53120 Mpixels/sec
Unified Shaders 336 1536 (x2)
Texture Mapping Units 56 96 (x2)
Render Output Units 32 32 (x2)
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit (x2)
Fab Process 40 nm 40 nm
Transistors 1950 million 2640 million
Bus PCIe x16 PCIe 2.1 x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant 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

Hide Prices

GeForce GTX 460 2GB

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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