GeForce GT 240 GDDR5 1GB vs GeForce GT 440 1.5GB

Intro

Compare that to the GeForce GT 440 1.5GB, which has GPU clock speed of 594 MHz, and 1536 MB of GDDR3 RAM running at 900 MHz through a 192-bit bus. It also is made up of 144 Stream Processors, 24 Texture Address Units, and 24 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 1.5GB		56 Watts
GeForce GT 240 GDDR5 1GB		70 Watts
	Difference: 14 Watts (25%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 240 GDDR5 1GB will be 26% quicker than the GeForce GT 440 1.5GB in general, because of its higher bandwidth. (explain)

GeForce GT 240 GDDR5 1GB		54400 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 11200 (26%)

Texel Rate

The GeForce GT 240 GDDR5 1GB will be much (about 23%) better at AF than the GeForce GT 440 1.5GB. (explain)

GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 3344 (23%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GT 440 1.5GB is the winner, by far. (explain)

GeForce GT 440 1.5GB		14256 Mpixels/sec
GeForce GT 240 GDDR5 1GB		4400 Mpixels/sec
	Difference: 9856 (224%)

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 data (in units of megabytes per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

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