GeForce GT 240 GDDR5 vs GeForce GTX 480

Intro

Compare those specs to the GeForce GTX 480, which comes with a core clock speed of 700 MHz and a GDDR5 memory frequency of 924 MHz. It also uses a 384-bit memory bus, and uses a 40 nm design. It is comprised of 480 SPUs, 60 TAUs, and 48 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
GeForce GTX 480		250 Watts
	Difference: 180 Watts (257%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 480 will be 226% faster than the GeForce GT 240 GDDR5 in general, due to its greater bandwidth. (explain)

GeForce GTX 480		177408 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 123008 (226%)

Texel Rate

The GeForce GTX 480 will be a lot (approximately 139%) more effective at texture filtering than the GeForce GT 240 GDDR5. (explain)

GeForce GTX 480		42000 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 24400 (139%)

Pixel Rate

The GeForce GTX 480 will be much (approximately 664%) more effective at AA than the GeForce GT 240 GDDR5, and should be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 480		33600 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 29200 (664%)

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 MB per second) that can be moved over the external memory interface in one second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

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