GeForce GT 240 GDDR5 vs GeForce GT 440 3GB

Intro

Compare those specifications to the GeForce GT 440 3GB, which has a core clock speed of 594 MHz and a GDDR3 memory frequency of 900 MHz. It also features a 192-bit memory bus, and makes use of a 40 nm design. It is comprised of 144 SPUs, 24 TAUs, and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 3GB		56 Watts
GeForce GT 240 GDDR5		70 Watts
	Difference: 14 Watts (25%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 240 GDDR5 should be 26% faster than the GeForce GT 440 3GB overall, due to its greater data rate. (explain)

GeForce GT 240 GDDR5		54400 MB/sec
GeForce GT 440 3GB		43200 MB/sec
	Difference: 11200 (26%)

Texel Rate

The GeForce GT 240 GDDR5 will be quite a bit (approximately 23%) more effective at anisotropic filtering than the GeForce GT 440 3GB. (explain)

GeForce GT 240 GDDR5		17600 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 3344 (23%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GT 440 3GB is the winner, and very much so. (explain)

GeForce GT 440 3GB		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 maximum amount of data (measured in MB per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR 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 number 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 applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. 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 rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.