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GeForce GTX 285 1GB vs Radeon HD 6990

Intro

The GeForce GTX 285 1GB uses a 55 nm design. nVidia has set the core speed at 648 MHz. The GDDR3 memory works at a frequency of 1242 MHz on this model. It features 240 SPUs along with 80 TAUs and 32 ROPs.

Compare all that to the Radeon HD 6990, which makes use of a 40 nm design. AMD has set the core speed at 830 MHz. The GDDR5 memory runs at a frequency of 1250 MHz on this particular card. It features 1536 SPUs as well as 96 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 1GB 204 Watts
Radeon HD 6990 375 Watts
Difference: 171 Watts (84%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6990 should perform a lot faster than the GeForce GTX 285 1GB in general. (explain)

Radeon HD 6990 320000 MB/sec
GeForce GTX 285 1GB 158976 MB/sec
Difference: 161024 (101%)

Texel Rate

The Radeon HD 6990 should be a lot (about 207%) more effective at texture filtering than the GeForce GTX 285 1GB. (explain)

Radeon HD 6990 159360 Mtexels/sec
GeForce GTX 285 1GB 51840 Mtexels/sec
Difference: 107520 (207%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6990 is a better choice, by far. (explain)

Radeon HD 6990 53120 Mpixels/sec
GeForce GTX 285 1GB 20736 Mpixels/sec
Difference: 32384 (156%)

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 285 1GB

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 285 1GB Radeon HD 6990
Manufacturer nVidia AMD
Year January 15, 2009 March 2011
Code Name G200b Antilles
Memory 1024 MB 2048 MB (x2)
Core Speed 648 MHz 830 MHz (x2)
Memory Speed 2484 MHz 5000 MHz (x2)
Power (Max TDP) 204 watts 375 watts
Bandwidth 158976 MB/sec 320000 MB/sec
Texel Rate 51840 Mtexels/sec 159360 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 53120 Mpixels/sec
Unified Shaders 240 1536 (x2)
Texture Mapping Units 80 96 (x2)
Render Output Units 32 32 (x2)
Bus Type GDDR3 GDDR5
Bus Width 512-bit 256-bit (x2)
Fab Process 55 nm 40 nm
Transistors 1400 million 2640 million
Bus PCIe x16 2.0 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in MB per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, 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 most 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 Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 285 1GB

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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