GeForce 9800 GTX vs GeForce GT 440 1.5GB

Intro

Compare 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 works at a speed of 900 MHz on this model. It features 144 SPUs along with 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 9800 GTX		140 Watts
	Difference: 84 Watts (150%)

Memory Bandwidth

Performance-wise, the GeForce 9800 GTX should theoretically be much better than the GeForce GT 440 1.5GB in general. (explain)

GeForce 9800 GTX		70400 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 27200 (63%)

Texel Rate

The GeForce 9800 GTX is quite a bit (about 203%) better at anisotropic filtering than the GeForce GT 440 1.5GB. (explain)

GeForce 9800 GTX		43200 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 28944 (203%)

Pixel Rate

The GeForce GT 440 1.5GB should be much (about 32%) faster with regards to anti-aliasing than the GeForce 9800 GTX, and also capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GT 440 1.5GB		14256 Mpixels/sec
GeForce 9800 GTX		10800 Mpixels/sec
	Difference: 3456 (32%)

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 largest amount of data (counted in megabytes per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR memory, the result 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 AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied 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. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core 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 is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.