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GeForce GTX 280 vs GeForce GTX 660

Intro

The GeForce GTX 280 uses a 65 nm design. nVidia has clocked the core speed at 602 MHz. The GDDR3 memory works at a speed of 1107 MHz on this particular card. It features 240 SPUs as well as 80 TAUs and 32 Rasterization Operator Units.

Compare that to the GeForce GTX 660, which comes with core speeds of 980 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 RAM. It features 960 SPUs as well as 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 280 236 Watts
Difference: 96 Watts (69%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 660 should theoretically be a bit better than the GeForce GTX 280 in general. (explain)

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

Texel Rate

The GeForce GTX 660 is much (approximately 63%) faster with regards to anisotropic filtering than the GeForce GTX 280. (explain)

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

Pixel Rate

The GeForce GTX 660 should be quite a bit (approximately 22%) better at full screen anti-aliasing than the GeForce GTX 280, and also should be capable of handling higher screen resolutions without losing too much performance. (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: Memory bandwidth is the max amount of data (counted in MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 are processed in one second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video 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 maximum number of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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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.

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