GeForce 9800 GTX vs GeForce GTX 660 Ti

Intro

Compare those specs 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 particular card. 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 GTX		140 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 10 Watts (7%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 660 Ti should perform a lot faster than the GeForce 9800 GTX in general. (explain)

GeForce GTX 660 Ti		144000 MB/sec
GeForce 9800 GTX		70400 MB/sec
	Difference: 73600 (105%)

Texel Rate

The GeForce GTX 660 Ti should be quite a bit (approximately 137%) better at texture filtering than the GeForce 9800 GTX. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
GeForce 9800 GTX		43200 Mtexels/sec
	Difference: 59280 (137%)

Pixel Rate

If running with a high screen 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 GTX		10800 Mpixels/sec
	Difference: 11160 (103%)

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 information (in units of MB per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, 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 calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the video card will be at 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 the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output 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 maximum fill rate.