GeForce GT 240 GDDR5 vs GeForce GTX 660

Intro

Compare those specifications to the GeForce GTX 660, which has a clock frequency of 980 MHz and a GDDR5 memory frequency of 1502 MHz. It also features 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 GT 240 GDDR5		70 Watts
GeForce GTX 660		140 Watts
	Difference: 70 Watts (100%)

Memory Bandwidth

The GeForce GTX 660 should in theory perform 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 will be much (about 345%) faster with regards to anisotropic filtering 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

The GeForce GTX 660 should be much (approximately 435%) faster with regards to full screen anti-aliasing than the GeForce GT 240 GDDR5, and also capable of handling higher resolutions without slowing down too much. (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 MB per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.