GeForce GT 240 GDDR5 1GB vs GeForce GTX 285 1GB

Intro

Compare those specs to the GeForce GTX 285 1GB, which has a GPU core clock speed of 648 MHz, and 1024 MB of GDDR3 RAM running at 1242 MHz through a 512-bit bus. It also features 240 Stream Processors, 80 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 1GB		70 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 134 Watts (191%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 285 1GB should in theory be a lot better than the GeForce GT 240 GDDR5 1GB overall. (explain)

GeForce GTX 285 1GB		158976 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 104576 (192%)

Texel Rate

The GeForce GTX 285 1GB should be a lot (more or less 195%) more effective at AF than the GeForce GT 240 GDDR5 1GB. (explain)

GeForce GTX 285 1GB		51840 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 34240 (195%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 285 1GB is the winner, by a large margin. (explain)

GeForce GTX 285 1GB		20736 Mpixels/sec
GeForce GT 240 GDDR5 1GB		4400 Mpixels/sec
	Difference: 16336 (371%)

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: Bandwidth is the maximum amount of data (counted in MB per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

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