GeForce GTX 285 1GB vs GeForce GTX 660 Ti

Intro

Compare those specifications to the GeForce GTX 660 Ti, which features a core clock speed of 915 MHz and a GDDR5 memory frequency of 1500 MHz. It also features a 192-bit bus, and makes use of a 28 nm design. It features 1344 SPUs, 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 285 1GB		204 Watts
	Difference: 54 Watts (36%)

Memory Bandwidth

Performance-wise, the GeForce GTX 285 1GB should in theory be a small bit better than the GeForce GTX 660 Ti overall. (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 quite a bit (about 98%) better at 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 should be a small bit (about 6%) faster with regards to AA than the GeForce GTX 285 1GB, and should be capable of handling higher screen resolutions while still performing well. (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: Bandwidth is the maximum amount of information (counted in MB per second) that can be moved over the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.