GeForce 9800 GTX+ vs GeForce GTX 660 Ti

Intro

Compare that to the GeForce GTX 660 Ti, which makes use of a 28 nm design. nVidia has clocked the core speed at 915 MHz. The GDDR5 RAM works at a frequency of 1500 MHz on this particular card. It features 1344 SPUs as well as 112 TAUs and 24 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GTX+		145 Watts
GeForce GTX 660 Ti		150 Watts
	Difference: 5 Watts (3%)

Memory Bandwidth

The GeForce GTX 660 Ti should in theory perform a lot faster than the GeForce 9800 GTX+ overall. (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 (about 117%) more effective at texture filtering than the GeForce 9800 GTX+. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
GeForce 9800 GTX+		47232 Mtexels/sec
	Difference: 55248 (117%)

Pixel Rate

The GeForce GTX 660 Ti will be a lot (more or less 86%) more effective at anti-aliasing than the GeForce 9800 GTX+, and also capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
GeForce 9800 GTX+		11808 Mpixels/sec
	Difference: 10152 (86%)

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 data (counted in megabytes per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total texture units by the core 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 applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.