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GeForce GTX 275 vs GeForce GTX 660

Intro

The GeForce GTX 275 comes with a GPU clock speed of 633 MHz, and the 896 MB of GDDR3 RAM is set to run at 1134 MHz through a 448-bit bus. It also is comprised of 240 Stream Processors, 80 Texture Address Units, and 28 ROPs.

Compare those specifications to the GeForce GTX 660, which features clock speeds of 980 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 memory. It features 960 SPUs along with 80 Texture Address Units and 24 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 140 Watts
GeForce GTX 275 219 Watts
Difference: 79 Watts (56%)

Memory Bandwidth

The GeForce GTX 660, in theory, should be a small bit faster than the GeForce GTX 275 in general. (explain)

GeForce GTX 660 144192 MB/sec
GeForce GTX 275 127008 MB/sec
Difference: 17184 (14%)

Texel Rate

The GeForce GTX 660 is much (more or less 55%) more effective at texture filtering than the GeForce GTX 275. (explain)

GeForce GTX 660 78400 Mtexels/sec
GeForce GTX 275 50640 Mtexels/sec
Difference: 27760 (55%)

Pixel Rate

The GeForce GTX 660 will be a lot (more or less 33%) better at full screen anti-aliasing than the GeForce GTX 275, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 660 23520 Mpixels/sec
GeForce GTX 275 17724 Mpixels/sec
Difference: 5796 (33%)

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 275

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 275 GeForce GTX 660
Manufacturer nVidia nVidia
Year April 9, 2009 September 2012
Code Name G200b GK106
Memory 896 MB 2048 MB
Core Speed 633 MHz 980 MHz
Memory Speed 2268 MHz 6008 MHz
Power (Max TDP) 219 watts 140 watts
Bandwidth 127008 MB/sec 144192 MB/sec
Texel Rate 50640 Mtexels/sec 78400 Mtexels/sec
Pixel Rate 17724 Mpixels/sec 23520 Mpixels/sec
Unified Shaders 240 960
Texture Mapping Units 80 80
Render Output Units 28 24
Bus Type GDDR3 GDDR5
Bus Width 448-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: Memory bandwidth is the max amount of information (measured in megabytes per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's 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 number of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units 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 rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 275

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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