GeForce GT 240 GDDR5 vs GeForce GTX 470

Intro

Compare those specifications to the GeForce GTX 470, which has a clock speed of 607 MHz and a GDDR5 memory frequency of 837 MHz. It also makes use of a 320-bit memory bus, and uses a 40 nm design. It is made up of 448 SPUs, 56 Texture Address Units, and 40 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
GeForce GTX 470		215 Watts
	Difference: 145 Watts (207%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 470 should in theory be much superior to the GeForce GT 240 GDDR5 overall. (explain)

GeForce GTX 470		133920 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 79520 (146%)

Texel Rate

The GeForce GTX 470 is a lot (approximately 93%) more effective at texture filtering than the GeForce GT 240 GDDR5. (explain)

GeForce GTX 470		33992 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 16392 (93%)

Pixel Rate

The GeForce GTX 470 should be a lot (about 452%) better at AA than the GeForce GT 240 GDDR5, and also should be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 470		24280 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 19880 (452%)

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 data (counted in MB per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the 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 one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.