GeForce GT 240 GDDR5 1GB vs GeForce GTX 275

Intro

Compare all that to the GeForce GTX 275, which comes with GPU clock speed of 633 MHz, and 896 MB of GDDR3 memory running at 1134 MHz through a 448-bit bus. It also is comprised of 240 SPUs, 80 TAUs, and 28 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 275		219 Watts
	Difference: 149 Watts (213%)

Memory Bandwidth

In theory, the GeForce GTX 275 should perform a lot faster than the GeForce GT 240 GDDR5 1GB in general. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 72608 (133%)

Texel Rate

The GeForce GTX 275 will be a lot (about 188%) better at AF than the GeForce GT 240 GDDR5 1GB. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 33040 (188%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 275 is the winner, by a large margin. (explain)

GeForce GTX 275		17724 Mpixels/sec
GeForce GT 240 GDDR5 1GB		4400 Mpixels/sec
	Difference: 13324 (303%)

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 largest amount of data (in units of megabytes per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the 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 number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units of the card 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.