GeForce 9800 GT 1GB vs GeForce GTX 660 Ti

Intro

Compare all of that to the GeForce GTX 660 Ti, which features GPU core speed of 915 MHz, and 2048 MB of GDDR5 RAM running at 1500 MHz through a 192-bit bus. It also features 1344 SPUs, 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

In theory, the GeForce GTX 660 Ti should be 150% quicker than the GeForce 9800 GT 1GB overall, due to its higher data rate. (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 a lot (about 205%) more effective at 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 running with high levels of AA 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 maximum amount of data (in units of MB per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. 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 can be applied per second. This number is calculated by multiplying the total number of texture units of the card by the core clock 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 a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.