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GeForce GTX 285 2GB vs GeForce GTX 660

Intro

The GeForce GTX 285 2GB has a GPU clock speed of 648 MHz, and the 2048 MB of GDDR3 RAM is set to run at 1242 MHz through a 512-bit bus. It also features 240 Stream Processors, 80 Texture Address Units, and 32 Raster Operation Units.

Compare those specifications to the GeForce GTX 660, which features GPU core speed of 980 MHz, and 2048 MB of GDDR5 memory set to run at 1502 MHz through a 192-bit bus. It also is comprised of 960 SPUs, 80 Texture Address Units, and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 140 Watts
GeForce GTX 285 2GB 204 Watts
Difference: 64 Watts (46%)

Memory Bandwidth

In theory, the GeForce GTX 285 2GB should be a small bit faster than the GeForce GTX 660 overall. (explain)

GeForce GTX 285 2GB 158976 MB/sec
GeForce GTX 660 144192 MB/sec
Difference: 14784 (10%)

Texel Rate

The GeForce GTX 660 will be a lot (approximately 51%) faster with regards to anisotropic filtering than the GeForce GTX 285 2GB. (explain)

GeForce GTX 660 78400 Mtexels/sec
GeForce GTX 285 2GB 51840 Mtexels/sec
Difference: 26560 (51%)

Pixel Rate

The GeForce GTX 660 will be a small bit (approximately 13%) faster with regards to anti-aliasing than the GeForce GTX 285 2GB, and also will be capable of handling higher screen resolutions better. (explain)

GeForce GTX 660 23520 Mpixels/sec
GeForce GTX 285 2GB 20736 Mpixels/sec
Difference: 2784 (13%)

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

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GeForce GTX 660

Amazon.com

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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 GeForce GTX 660
Manufacturer nVidia nVidia
Year January 15, 2009 September 2012
Code Name G200b GK106
Memory 2048 MB 2048 MB
Core Speed 648 MHz 980 MHz
Memory Speed 2484 MHz 6008 MHz
Power (Max TDP) 204 watts 140 watts
Bandwidth 158976 MB/sec 144192 MB/sec
Texel Rate 51840 Mtexels/sec 78400 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 23520 Mpixels/sec
Unified Shaders 240 960
Texture Mapping Units 80 80
Render Output Units 32 24
Bus Type GDDR3 GDDR5
Bus Width 512-bit 192-bit
Fab Process 55 nm 28 nm
Transistors 1400 million 2540 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.0
OpenGL Version OpenGL 3.1 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher 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 most pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GTX 285 2GB

Amazon.com

Check prices at:

GeForce GTX 660

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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