GeForce GT 240 GDDR5 vs GeForce GTX 660

Intro

Compare those specifications to the GeForce GTX 660, which comes with GPU core speed of 980 MHz, and 2048 MB of GDDR5 memory set to run at 1502 MHz through a 192-bit bus. It also is made up of 960 Stream Processors, 80 TAUs, and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

The GeForce GTX 660, in theory, should be much faster than the GeForce GT 240 GDDR5 in general. (explain)

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

Texel Rate

The GeForce GTX 660 is a lot (more or less 345%) better at AF than the GeForce GT 240 GDDR5. (explain)

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

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 660 is superior to the GeForce GT 240 GDDR5, by far. (explain)

GeForce GTX 660		23520 Mpixels/sec
GeForce GT 240 GDDR5		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 (measured in megabytes per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the 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 maximum amount of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the card's clock speed. 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 many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.