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GeForce GTX 280 vs GeForce GTX 660

Intro

The GeForce GTX 280 has a GPU core speed of 602 MHz, and the 1024 MB of GDDR3 memory runs at 1107 MHz through a 512-bit bus. It also features 240 Stream Processors, 80 Texture Address Units, and 32 Raster Operation Units.

Compare all that to the GeForce GTX 660, which has a clock frequency of 980 MHz and a GDDR5 memory speed of 1502 MHz. It also uses a 192-bit memory bus, and makes use of a 28 nm design. It is comprised of 960 SPUs, 80 Texture Address Units, and 24 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 140 Watts
GeForce GTX 280 236 Watts
Difference: 96 Watts (69%)

Memory Bandwidth

The GeForce GTX 660, in theory, should perform a small bit faster than the GeForce GTX 280 overall. (explain)

GeForce GTX 660 144192 MB/sec
GeForce GTX 280 141696 MB/sec
Difference: 2496 (2%)

Texel Rate

The GeForce GTX 660 will be a lot (more or less 63%) more effective at texture filtering than the GeForce GTX 280. (explain)

GeForce GTX 660 78400 Mtexels/sec
GeForce GTX 280 48160 Mtexels/sec
Difference: 30240 (63%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 660 is superior to the GeForce GTX 280, and very much so. (explain)

GeForce GTX 660 23520 Mpixels/sec
GeForce GTX 280 19264 Mpixels/sec
Difference: 4256 (22%)

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 280

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.

Specifications

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Model GeForce GTX 280 GeForce GTX 660
Manufacturer nVidia nVidia
Year June 17, 2008 September 2012
Code Name G200 GK106
Memory 1024 MB 2048 MB
Core Speed 602 MHz 980 MHz
Memory Speed 2214 MHz 6008 MHz
Power (Max TDP) 236 watts 140 watts
Bandwidth 141696 MB/sec 144192 MB/sec
Texel Rate 48160 Mtexels/sec 78400 Mtexels/sec
Pixel Rate 19264 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 65 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 largest amount of information (measured in megabytes per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster 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 can be applied per second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour 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 output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 280

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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