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GeForce GTX 285 2GB vs Radeon HD 6990

Intro

The GeForce GTX 285 2GB has a core clock frequency of 648 MHz and a GDDR3 memory speed of 1242 MHz. It also uses a 512-bit memory bus, and uses a 55 nm design. It features 240 SPUs, 80 TAUs, and 32 Raster Operation Units.

Compare those specs to the Radeon HD 6990, which comes with a clock frequency of 830 MHz and a GDDR5 memory speed of 1250 MHz. It also features a 256-bit bus, and uses a 40 nm design. It is made up of 1536 SPUs, 96 Texture Address Units, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 2GB 204 Watts
Radeon HD 6990 375 Watts
Difference: 171 Watts (84%)

Memory Bandwidth

Performance-wise, the Radeon HD 6990 should in theory be a lot better than the GeForce GTX 285 2GB in general. (explain)

Radeon HD 6990 320000 MB/sec
GeForce GTX 285 2GB 158976 MB/sec
Difference: 161024 (101%)

Texel Rate

The Radeon HD 6990 should be quite a bit (more or less 207%) better at anisotropic filtering than the GeForce GTX 285 2GB. (explain)

Radeon HD 6990 159360 Mtexels/sec
GeForce GTX 285 2GB 51840 Mtexels/sec
Difference: 107520 (207%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 6990 is superior to the GeForce GTX 285 2GB, by far. (explain)

Radeon HD 6990 53120 Mpixels/sec
GeForce GTX 285 2GB 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 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 285 2GB Radeon HD 6990
Manufacturer nVidia AMD
Year January 15, 2009 March 2011
Code Name G200b Antilles
Memory 2048 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 maximum amount of information (measured in megabytes per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. 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 rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 285 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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