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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 as well as 8 TAUs and 4 ROPs.

Compare all of that to the GeForce GT 430 (OEM), which makes use of a 40 nm design. nVidia has clocked the core speed at 700 MHz. The GDDR3 memory runs at a speed of 900 MHz on this specific card. It features 96 SPUs as well as 16 TAUs and 4 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

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 in theory 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) should be quite a bit (more or less 115%) better 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

The GeForce GT 430 (OEM) should be a little bit (about 8%) more effective at AA than the GeForce 8400 GS 512MB, and capable of handling higher resolutions while still performing well. (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

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

Model GeForce 8400 GS 512MB GeForce GT 430 (OEM)
Manufacturer nVidia nVidia
Year June 2007 October 2010
Code Name G86 GF108
Fab Process 80 nm 40 nm
Bus PCIe x16, PCI PCIe x16
Memory 512 MB 2048 MB
Core Speed 650 MHz 700 MHz
Shader Speed 1100 MHz 1400 MHz
Memory Speed 400 MHz (800 MHz effective) 900 MHz (1800 MHz effective)
Unified Shaders 16 96
Texture Mapping Units 8 16
Render Output Units 4 4
Bus Type DDR2 GDDR3
Bus Width 64-bit 128-bit
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1
Power (Max TDP) 40 watts 60 watts
Shader Model 4.0 5.0
Bandwidth 6400 MB/sec 28800 MB/sec
Texel Rate 5200 Mtexels/sec 11200 Mtexels/sec
Pixel Rate 2600 Mpixels/sec 2800 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock 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 per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

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