GeForce GT 240 GDDR5 vs GeForce GT 440 1.5GB

Intro

Compare all that to the GeForce GT 440 1.5GB, which makes use of a 40 nm design. nVidia has clocked the core speed at 594 MHz. The GDDR3 RAM runs at a frequency of 900 MHz on this specific model. It features 144 SPUs as well as 24 TAUs and 24 ROPs.

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		70 Watts
	Difference: 14 Watts (25%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 240 GDDR5 is 26% faster than the GeForce GT 440 1.5GB overall, due to its greater data rate. (explain)

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

Texel Rate

The GeForce GT 240 GDDR5 is a lot (more or less 23%) more effective at anisotropic filtering than the GeForce GT 440 1.5GB. (explain)

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

Pixel Rate

The GeForce GT 440 1.5GB should be much (about 224%) more effective at full screen anti-aliasing than the GeForce GT 240 GDDR5, and should be capable of handling higher screen resolutions more effectively. (explain)

GeForce GT 440 1.5GB		14256 Mpixels/sec
GeForce GT 240 GDDR5		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 information (counted in MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster 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 applied in one second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.