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GeForce 8400 GS 512MB vs GeForce GT 440 3GB

Intro

The GeForce 8400 GS 512MB comes with a GPU clock speed of 650 MHz, and the 512 MB of DDR2 memory runs at 400 MHz through a 64-bit bus. It also is made up of 16 SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Compare those specifications to the GeForce GT 440 3GB, which comes with GPU core speed of 594 MHz, and 3072 MB of GDDR3 memory running at 900 MHz through a 192-bit bus. It also features 144 Stream Processors, 24 Texture Address Units, and 24 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8400 GS 512MB 40 Watts
GeForce GT 440 3GB 56 Watts
Difference: 16 Watts (40%)

Memory Bandwidth

The GeForce GT 440 3GB should theoretically perform quite a bit faster than the GeForce 8400 GS 512MB in general. (explain)

GeForce GT 440 3GB 43200 MB/sec
GeForce 8400 GS 512MB 6400 MB/sec
Difference: 36800 (575%)

Texel Rate

The GeForce GT 440 3GB should be quite a bit (about 174%) better at anisotropic filtering than the GeForce 8400 GS 512MB. (explain)

GeForce GT 440 3GB 14256 Mtexels/sec
GeForce 8400 GS 512MB 5200 Mtexels/sec
Difference: 9056 (174%)

Pixel Rate

The GeForce GT 440 3GB should be a lot (more or less 448%) better at full screen anti-aliasing than the GeForce 8400 GS 512MB, and able to handle higher screen resolutions more effectively. (explain)

GeForce GT 440 3GB 14256 Mpixels/sec
GeForce 8400 GS 512MB 2600 Mpixels/sec
Difference: 11656 (448%)

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

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GeForce 8400 GS 512MB

Amazon.com

Check prices at:

GeForce GT 440 3GB

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce 8400 GS 512MB GeForce GT 440 3GB
Manufacturer nVidia nVidia
Year June 2007 October 2010
Code Name G86 GF106
Memory 512 MB 3072 MB
Core Speed 650 MHz 594 MHz
Memory Speed 800 MHz 1800 MHz
Power (Max TDP) 40 watts 56 watts
Bandwidth 6400 MB/sec 43200 MB/sec
Texel Rate 5200 Mtexels/sec 14256 Mtexels/sec
Pixel Rate 2600 Mpixels/sec 14256 Mpixels/sec
Unified Shaders 16 144
Texture Mapping Units 8 24
Render Output Units 4 24
Bus Type DDR2 GDDR3
Bus Width 64-bit 192-bit
Fab Process 80 nm 40 nm
Transistors 210 million 1170 million
Bus PCIe x16, PCI PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in MB per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. 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 can be processed per second. This number is calculated by multiplying the total number of texture units of the card 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 a second.

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

Display Prices

Hide Prices

GeForce 8400 GS 512MB

Amazon.com

Check prices at:

GeForce GT 440 3GB

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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