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GeForce GTX 285 1GB vs Radeon HD 7990

Intro

The GeForce GTX 285 1GB makes use of a 55 nm design. nVidia has clocked the core speed at 648 MHz. The GDDR3 RAM works at a frequency of 1242 MHz on this model. It features 240 SPUs along with 80 Texture Address Units and 32 Rasterization Operator Units.

Compare all of that to the Radeon HD 7990, which has a GPU core clock speed of 950 MHz, and 3072 MB of GDDR5 RAM running at 1500 MHz through a 384-bit bus. It also is made up of 2048 SPUs, 128 Texture Address Units, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 1GB 204 Watts
Radeon HD 7990 375 Watts
Difference: 171 Watts (84%)

Memory Bandwidth

The Radeon HD 7990 should theoretically perform a lot faster than the GeForce GTX 285 1GB in general. (explain)

Radeon HD 7990 576000 MB/sec
GeForce GTX 285 1GB 158976 MB/sec
Difference: 417024 (262%)

Texel Rate

The Radeon HD 7990 is quite a bit (approximately 369%) more effective at texture filtering than the GeForce GTX 285 1GB. (explain)

Radeon HD 7990 243200 Mtexels/sec
GeForce GTX 285 1GB 51840 Mtexels/sec
Difference: 191360 (369%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 7990 is superior to the GeForce GTX 285 1GB, by a large margin. (explain)

Radeon HD 7990 60800 Mpixels/sec
GeForce GTX 285 1GB 20736 Mpixels/sec
Difference: 40064 (193%)

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 7990

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 7990
Manufacturer nVidia AMD
Year January 15, 2009 April 2013
Code Name G200b Malta
Memory 1024 MB 3072 MB (x2)
Core Speed 648 MHz 950 MHz (x2)
Memory Speed 2484 MHz 6000 MHz (x2)
Power (Max TDP) 204 watts 375 watts
Bandwidth 158976 MB/sec 576000 MB/sec
Texel Rate 51840 Mtexels/sec 243200 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 60800 Mpixels/sec
Unified Shaders 240 2048 (x2)
Texture Mapping Units 80 128 (x2)
Render Output Units 32 32 (x2)
Bus Type GDDR3 GDDR5
Bus Width 512-bit 384-bit (x2)
Fab Process 55 nm 28 nm
Transistors 1400 million 4313 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.1 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of information (measured in megabytes per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better 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 can be applied in one second. This 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 processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

GeForce GTX 285 1GB

Amazon.com

Check prices at:

Radeon HD 7990

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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