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GeForce GTX 285 1GB vs Radeon HD 6790

Intro

The GeForce GTX 285 1GB uses a 55 nm design. nVidia has set the core speed at 648 MHz. The GDDR3 memory is set to run 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 those specs to the Radeon HD 6790, which makes use of a 40 nm design. AMD has clocked the core frequency at 840 MHz. The GDDR5 RAM runs at a speed of 1050 MHz on this model. It features 800 SPUs as well as 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 1GB 204 Watts
Difference: 54 Watts (36%)

Memory Bandwidth

The GeForce GTX 285 1GB should in theory be a small bit faster than the Radeon HD 6790 in general. (explain)

GeForce GTX 285 1GB 158976 MB/sec
Radeon HD 6790 134400 MB/sec
Difference: 24576 (18%)

Texel Rate

The GeForce GTX 285 1GB will be a lot (more or less 54%) faster with regards to AF than the Radeon HD 6790. (explain)

GeForce GTX 285 1GB 51840 Mtexels/sec
Radeon HD 6790 33600 Mtexels/sec
Difference: 18240 (54%)

Pixel Rate

The GeForce GTX 285 1GB is much (about 54%) more effective at full screen anti-aliasing than the Radeon HD 6790, and able to handle higher screen resolutions better. (explain)

GeForce GTX 285 1GB 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 1GB

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 1GB Radeon HD 6790
Manufacturer nVidia AMD
Year January 15, 2009 April 2011
Code Name G200b Barts LE
Memory 1024 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: Bandwidth is the maximum amount of information (in units of MB per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum 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 clock speed of the chip. The better the texel rate, 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 most pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate 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 outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory 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 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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