GeForce 8400 GS 512MB vs GeForce GT 430

Intro

Compare those specifications to the GeForce GT 430, which features GPU core speed of 700 MHz, and 512 MB of GDDR3 RAM set to run at 900 MHz through a 128-bit bus. It also is comprised of 96 Stream Processors, 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		60 Watts
	Difference: 20 Watts (50%)

Memory Bandwidth

The GeForce GT 430 should theoretically perform much faster than the GeForce 8400 GS 512MB in general. (explain)

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

Texel Rate

The GeForce GT 430 should be a lot (approximately 115%) more effective at anisotropic filtering than the GeForce 8400 GS 512MB. (explain)

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

Pixel Rate

The GeForce GT 430 should be a bit (more or less 8%) more effective at AA than the GeForce 8400 GS 512MB, and will be able to handle higher screen resolutions more effectively. (explain)

GeForce GT 430		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

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR 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 number of texture units by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.