GeForce GT 240 GDDR5 vs GeForce GT 320

Intro

Compare those specifications to the GeForce GT 320, which features core speeds of 540 MHz on the GPU, and 790 MHz on the 1024 MB of GDDR3 RAM. It features 72 SPUs along with 24 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce GT 240 GDDR5		70 Watts
	Difference: 27 Watts (63%)

Memory Bandwidth

As far as performance goes, the GeForce GT 240 GDDR5 should in theory be a lot superior to the GeForce GT 320 overall. (explain)

GeForce GT 240 GDDR5		54400 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 29120 (115%)

Texel Rate

The GeForce GT 240 GDDR5 is a lot (approximately 36%) better at texture filtering than the GeForce GT 320. (explain)

GeForce GT 240 GDDR5		17600 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 4640 (36%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GT 240 GDDR5 is superior to the GeForce GT 320, though only just barely. (explain)

GeForce GT 240 GDDR5		4400 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 80 (2%)

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 max amount of information (counted in MB per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total amount of 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.