GeForce GT 240 GDDR5 vs Geforce GTX 680

Intro

Compare all of that to the Geforce GTX 680, which comes with GPU clock speed of 1006 MHz, and 2048 MB of GDDR5 RAM set to run at 1502 MHz through a 256-bit bus. It also features 1536 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
Geforce GTX 680		195 Watts
	Difference: 125 Watts (179%)

Memory Bandwidth

Performance-wise, the Geforce GTX 680 should in theory be quite a bit superior to the GeForce GT 240 GDDR5 in general. (explain)

Geforce GTX 680		192256 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 137856 (253%)

Texel Rate

The Geforce GTX 680 is much (more or less 632%) better at texture filtering than the GeForce GT 240 GDDR5. (explain)

Geforce GTX 680		128768 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 111168 (632%)

Pixel Rate

The Geforce GTX 680 is much (about 632%) faster with regards to anti-aliasing than the GeForce GT 240 GDDR5, and will be capable of handling higher screen resolutions without slowing down too much. (explain)

Geforce GTX 680		32192 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 27792 (632%)

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 transferred past the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 can be processed per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 number of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called 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, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.