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GeForce GTX 285 2GB vs Radeon HD 6790

Intro

The GeForce GTX 285 2GB features core clock speeds of 648 MHz on the GPU, and 1242 MHz on the 2048 MB of GDDR3 memory. It features 240 SPUs along with 80 Texture Address Units and 32 ROPs.

Compare those specs to the Radeon HD 6790, which features a clock frequency of 840 MHz and a GDDR5 memory frequency of 1050 MHz. It also uses a 256-bit memory 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

Theoretically speaking, the GeForce GTX 285 2GB should be 18% quicker than the Radeon HD 6790 overall, because of its higher data rate. (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 (more or less 54%) faster with regards to texture 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

The GeForce GTX 285 2GB is much (more or less 54%) faster with regards to FSAA than the Radeon HD 6790, and should be capable of handling higher screen resolutions better. (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 max amount of data (measured in MB per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed 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 the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory 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 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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