GeForce GTX 285 1GB vs GeForce GTX 660 Ti

Intro

Compare all that to the GeForce GTX 660 Ti, which uses a 28 nm design. nVidia has clocked the core speed at 915 MHz. The GDDR5 memory works at a speed of 1500 MHz on this model. It features 1344 SPUs along with 112 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 Ti		150 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 54 Watts (36%)

Memory Bandwidth

In theory, the GeForce GTX 285 1GB will be 10% quicker than the GeForce GTX 660 Ti in general, because of its higher bandwidth. (explain)

GeForce GTX 285 1GB		158976 MB/sec
GeForce GTX 660 Ti		144000 MB/sec
	Difference: 14976 (10%)

Texel Rate

The GeForce GTX 660 Ti will be much (about 98%) faster with regards to anisotropic filtering than the GeForce GTX 285 1GB. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
GeForce GTX 285 1GB		51840 Mtexels/sec
	Difference: 50640 (98%)

Pixel Rate

The GeForce GTX 660 Ti is a small bit (about 6%) more effective at anti-aliasing than the GeForce GTX 285 1GB, and should be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
GeForce GTX 285 1GB		20736 Mpixels/sec
	Difference: 1224 (6%)

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: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, 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, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the card's 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 rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.