GeForce GTX 260 216SP 55 nm vs GeForce GTX 660 Ti

Intro

Compare all that to the GeForce GTX 660 Ti, which makes use of a 28 nm design. nVidia has clocked the core speed at 915 MHz. The GDDR5 RAM works at a speed of 1500 MHz on this specific model. It features 1344 SPUs as well as 112 Texture Address Units and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti		150 Watts
GeForce GTX 260 216SP 55 nm		171 Watts
	Difference: 21 Watts (14%)

Memory Bandwidth

Performance-wise, the GeForce GTX 660 Ti should theoretically be quite a bit better than the GeForce GTX 260 216SP 55 nm in general. (explain)

GeForce GTX 660 Ti		144000 MB/sec
GeForce GTX 260 216SP 55 nm		111888 MB/sec
	Difference: 32112 (29%)

Texel Rate

The GeForce GTX 660 Ti should be quite a bit (approximately 147%) better at anisotropic filtering than the GeForce GTX 260 216SP 55 nm. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
GeForce GTX 260 216SP 55 nm		41472 Mtexels/sec
	Difference: 61008 (147%)

Pixel Rate

The GeForce GTX 660 Ti should be much (about 36%) more effective at AA than the GeForce GTX 260 216SP 55 nm, and also able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
GeForce GTX 260 216SP 55 nm		16128 Mpixels/sec
	Difference: 5832 (36%)

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 maximum amount of data (counted in MB per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR memory, 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total texture units of the card by the core 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called 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 of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.