GeForce GT 240 GDDR5 1GB vs GeForce GTX 660

Intro

Compare those specs to the GeForce GTX 660, which has GPU core speed of 980 MHz, and 2048 MB of GDDR5 RAM set to run at 1502 MHz through a 192-bit bus. It also is comprised of 960 Stream Processors, 80 Texture Address Units, and 24 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 1GB		70 Watts
GeForce GTX 660		140 Watts
	Difference: 70 Watts (100%)

Memory Bandwidth

In theory, the GeForce GTX 660 will be 165% faster than the GeForce GT 240 GDDR5 1GB in general, because of its greater data rate. (explain)

GeForce GTX 660		144192 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 89792 (165%)

Texel Rate

The GeForce GTX 660 will be much (more or less 345%) better at texture filtering than the GeForce GT 240 GDDR5 1GB. (explain)

GeForce GTX 660		78400 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 60800 (345%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 660 is the winner, by a large margin. (explain)

GeForce GTX 660		23520 Mpixels/sec
GeForce GT 240 GDDR5 1GB		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: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.