GeForce 9800 GT 1GB vs GeForce GT 240 GDDR5 1GB

Intro

Compare that to the GeForce GT 240 GDDR5 1GB, which makes use of a 40 nm design. nVidia has clocked the core speed at 550 MHz. The GDDR5 RAM runs at a frequency of 850 MHz on this card. It features 96 SPUs as well as 32 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 1GB		70 Watts
GeForce 9800 GT 1GB		105 Watts
	Difference: 35 Watts (50%)

Memory Bandwidth

The GeForce 9800 GT 1GB, in theory, should be a little bit faster than the GeForce GT 240 GDDR5 1GB in general. (explain)

GeForce 9800 GT 1GB		57600 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 3200 (6%)

Texel Rate

The GeForce 9800 GT 1GB should be a lot (more or less 91%) better at anisotropic filtering than the GeForce GT 240 GDDR5 1GB. (explain)

GeForce 9800 GT 1GB		33600 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 16000 (91%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 9800 GT 1GB is the winner, and very much so. (explain)

GeForce 9800 GT 1GB		9600 Mpixels/sec
GeForce GT 240 GDDR5 1GB		4400 Mpixels/sec
	Difference: 5200 (118%)

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 megabytes per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 amount of texture map elements (texels) that are processed per second. This figure is worked out 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record 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 the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.