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GeForce 8400 GS 512MB vs GeForce GT 430 (OEM)

Intro

The GeForce 8400 GS 512MB comes with core speeds of 650 MHz on the GPU, and 400 MHz on the 512 MB of DDR2 RAM. It features 16 SPUs as well as 8 Texture Address Units and 4 ROPs.

Compare that to the GeForce GT 430 (OEM), which features a clock speed of 700 MHz and a GDDR3 memory speed of 900 MHz. It also makes use of a 128-bit bus, and makes use of a 40 nm design. It features 96 SPUs, 16 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8400 GS 512MB 40 Watts
GeForce GT 430 (OEM) 60 Watts
Difference: 20 Watts (50%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 430 (OEM) should be quite a bit faster than the GeForce 8400 GS 512MB in general. (explain)

GeForce GT 430 (OEM) 28800 MB/sec
GeForce 8400 GS 512MB 6400 MB/sec
Difference: 22400 (350%)

Texel Rate

The GeForce GT 430 (OEM) is much (more or less 115%) better at anisotropic filtering than the GeForce 8400 GS 512MB. (explain)

GeForce GT 430 (OEM) 11200 Mtexels/sec
GeForce 8400 GS 512MB 5200 Mtexels/sec
Difference: 6000 (115%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GT 430 (OEM) is a better choice, though not by far. (explain)

GeForce GT 430 (OEM) 2800 Mpixels/sec
GeForce 8400 GS 512MB 2600 Mpixels/sec
Difference: 200 (8%)

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

Display Prices

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GeForce 8400 GS 512MB

Amazon.com

GeForce GT 430 (OEM)

Amazon.com

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

Display Specifications

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Model GeForce 8400 GS 512MB GeForce GT 430 (OEM)
Manufacturer nVidia nVidia
Year June 2007 October 2010
Code Name G86 GF108
Memory 512 MB 2048 MB
Core Speed 650 MHz 700 MHz
Memory Speed 800 MHz 1800 MHz
Power (Max TDP) 40 watts 60 watts
Bandwidth 6400 MB/sec 28800 MB/sec
Texel Rate 5200 Mtexels/sec 11200 Mtexels/sec
Pixel Rate 2600 Mpixels/sec 2800 Mpixels/sec
Unified Shaders 16 96
Texture Mapping Units 8 16
Render Output Units 4 4
Bus Type DDR2 GDDR3
Bus Width 64-bit 128-bit
Fab Process 80 nm 40 nm
Transistors 210 million 585 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 max amount of information (measured in MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs 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 rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

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