GeForce 9800 GT 1GB vs GeForce GTX 660 Ti

Intro

Compare all of that to the GeForce GTX 660 Ti, which comes with clock speeds of 915 MHz on the GPU, and 1500 MHz on the 2048 MB of GDDR5 memory. It features 1344 SPUs along with 112 Texture Address Units and 24 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 1GB		105 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 45 Watts (43%)

Memory Bandwidth

Theoretically, the GeForce GTX 660 Ti should be much faster than the GeForce 9800 GT 1GB overall. (explain)

GeForce GTX 660 Ti		144000 MB/sec
GeForce 9800 GT 1GB		57600 MB/sec
	Difference: 86400 (150%)

Texel Rate

The GeForce GTX 660 Ti is quite a bit (more or less 205%) faster with regards to anisotropic filtering than the GeForce 9800 GT 1GB. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
GeForce 9800 GT 1GB		33600 Mtexels/sec
	Difference: 68880 (205%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 660 Ti is the winner, by far. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
GeForce 9800 GT 1GB		9600 Mpixels/sec
	Difference: 12360 (129%)

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 max amount of data (in units of megabytes per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.