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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 frequency of 400 MHz on this particular model. It features 16 SPUs as well as 8 TAUs and 4 ROPs.

Compare those specs to the GeForce GT 430 (OEM), which comes with a GPU core clock speed of 700 MHz, and 2048 MB of GDDR3 memory running at 900 MHz through a 128-bit bus. It also 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

The GeForce GT 430 (OEM) should theoretically perform a lot 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) will be a lot (approximately 115%) more effective at AF 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, but 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

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 largest amount of information (in units of MB per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of 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 Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

GeForce 8400 GS 512MB

GeForce GT 430 (OEM)

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