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

Intro

The GeForce 8400 GS 512MB uses a 80 nm design. nVidia has clocked the core speed at 650 MHz. The DDR2 RAM runs at a speed of 400 MHz on this specific model. It features 16 SPUs along with 8 TAUs and 4 Rasterization Operator Units.

Compare those specs to the GeForce GT 430 (OEM), which has core speeds of 700 MHz on the GPU, and 900 MHz on the 2048 MB of GDDR3 RAM. It features 96 SPUs along with 16 TAUs and 4 Rasterization Operator 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

In theory, the GeForce GT 430 (OEM) should be 350% quicker than the GeForce 8400 GS 512MB in general, because of its greater bandwidth. (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) will be much (more or less 115%) faster with regards to texture 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 a high resolution is important to you, then the GeForce GT 430 (OEM) is superior to the GeForce 8400 GS 512MB, but only just. (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

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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

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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 data (counted in MB per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

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