GeForce GTS 150 vs GeForce GTX 660

Intro

Compare all of that to the GeForce GTX 660, which uses a 28 nm design. nVidia has clocked the core speed at 980 MHz. The GDDR5 memory works at a speed of 1502 MHz on this specific model. It features 960 SPUs as well as 80 TAUs and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660		140 Watts
GeForce GTS 150		141 Watts
	Difference: 1 Watts (1%)

Memory Bandwidth

The GeForce GTX 660 should in theory be much faster than the GeForce GTS 150 in general. (explain)

GeForce GTX 660		144192 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 112192 (351%)

Texel Rate

The GeForce GTX 660 should be much (about 66%) more effective at anisotropic filtering than the GeForce GTS 150. (explain)

GeForce GTX 660		78400 Mtexels/sec
GeForce GTS 150		47360 Mtexels/sec
	Difference: 31040 (66%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 660 is a better choice, and very much so. (explain)

GeForce GTX 660		23520 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 11680 (99%)

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

Specifications

Memory Bandwidth: Bandwidth is the max amount of data (counted in MB per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's 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 can be applied per 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 better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.