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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 memory. It features 16 SPUs along with 8 Texture Address Units and 4 ROPs.

Compare those specs to the GeForce GT 430 (OEM), which comes with a core clock frequency of 700 MHz and a GDDR3 memory speed of 900 MHz. It also uses a 128-bit bus, and makes use of a 40 nm design. It features 96 SPUs, 16 TAUs, and 4 ROPs.

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) is 350% faster than the GeForce 8400 GS 512MB in general, because of its higher 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) is quite a bit (approximately 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

The GeForce GT 430 (OEM) should be a bit (approximately 8%) better at AA than the GeForce 8400 GS 512MB, and should be able to handle higher screen resolutions more effectively. (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

GeForce 8400 GS 512MB

GeForce GT 430 (OEM)

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: Bandwidth is the max amount of data (counted in megabytes per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 texture map elements (texels) that can be 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 higher 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 maximum number of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units 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 fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

GeForce 8400 GS 512MB

GeForce GT 430 (OEM)

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