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GeForce GTX 285 2GB vs Radeon HD 6790

Intro

The GeForce GTX 285 2GB features a core clock frequency of 648 MHz and a GDDR3 memory frequency of 1242 MHz. It also features a 512-bit memory bus, and makes use of a 55 nm design. It is comprised of 240 SPUs, 80 TAUs, and 32 ROPs.

Compare that to the Radeon HD 6790, which comes with a clock frequency of 840 MHz and a GDDR5 memory frequency of 1050 MHz. It also uses a 256-bit bus, and makes use of a 40 nm design. It is comprised of 800 SPUs, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790 150 Watts
GeForce GTX 285 2GB 204 Watts
Difference: 54 Watts (36%)

Memory Bandwidth

Performance-wise, the GeForce GTX 285 2GB should theoretically be a small bit superior to the Radeon HD 6790 in general. (explain)

GeForce GTX 285 2GB 158976 MB/sec
Radeon HD 6790 134400 MB/sec
Difference: 24576 (18%)

Texel Rate

The GeForce GTX 285 2GB will be quite a bit (approximately 54%) better at anisotropic filtering than the Radeon HD 6790. (explain)

GeForce GTX 285 2GB 51840 Mtexels/sec
Radeon HD 6790 33600 Mtexels/sec
Difference: 18240 (54%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 285 2GB is superior to the Radeon HD 6790, and very much so. (explain)

GeForce GTX 285 2GB 20736 Mpixels/sec
Radeon HD 6790 13440 Mpixels/sec
Difference: 7296 (54%)

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.

Price Comparison

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GeForce GTX 285 2GB

Amazon.com

Check prices at:

Radeon HD 6790

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 6790
Manufacturer nVidia AMD
Year January 15, 2009 April 2011
Code Name G200b Barts LE
Memory 2048 MB 1024 MB
Core Speed 648 MHz 840 MHz
Memory Speed 2484 MHz 4200 MHz
Power (Max TDP) 204 watts 150 watts
Bandwidth 158976 MB/sec 134400 MB/sec
Texel Rate 51840 Mtexels/sec 33600 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 13440 Mpixels/sec
Unified Shaders 240 800
Texture Mapping Units 80 40
Render Output Units 32 16
Bus Type GDDR3 GDDR5
Bus Width 512-bit 256-bit
Fab Process 55 nm 40 nm
Transistors 1400 million 1700 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 information (measured in megabytes per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics 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 most pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 285 2GB

Amazon.com

Check prices at:

Radeon HD 6790

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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