GeForce 9500 GT DDR2 vs GeForce GTX 660

Intro

Compare those specs to the GeForce GTX 660, which features a core clock frequency of 980 MHz and a GDDR5 memory speed of 1502 MHz. It also makes use of a 192-bit bus, and uses a 28 nm design. It is comprised of 960 SPUs, 80 Texture Address Units, and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9500 GT DDR2		50 Watts
GeForce GTX 660		140 Watts
	Difference: 90 Watts (180%)

Memory Bandwidth

The GeForce GTX 660, in theory, should perform a lot faster than the GeForce 9500 GT DDR2 overall. (explain)

GeForce GTX 660		144192 MB/sec
GeForce 9500 GT DDR2		16000 MB/sec
	Difference: 128192 (801%)

Texel Rate

The GeForce GTX 660 is much (about 791%) faster with regards to AF than the GeForce 9500 GT DDR2. (explain)

GeForce GTX 660		78400 Mtexels/sec
GeForce 9500 GT DDR2		8800 Mtexels/sec
	Difference: 69600 (791%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 660 is superior to the GeForce 9500 GT DDR2, and very much so. (explain)

GeForce GTX 660		23520 Mpixels/sec
GeForce 9500 GT DDR2		4400 Mpixels/sec
	Difference: 19120 (435%)

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 max amount of data (in units of megabytes per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's 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 amount of texture map elements (texels) that are processed per second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.