GeForce GT 320 vs GeForce GT 430 1GB

Intro

Compare those specs to the GeForce GT 430 1GB, which features core speeds of 700 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR3 memory. It features 96 SPUs as well as 16 Texture Address Units and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce GT 430 1GB		60 Watts
	Difference: 17 Watts (40%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 430 1GB is 14% quicker than the GeForce GT 320 overall, because of its greater bandwidth. (explain)

GeForce GT 430 1GB		28800 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 3520 (14%)

Texel Rate

The GeForce GT 320 is a small bit (approximately 16%) better at anisotropic filtering than the GeForce GT 430 1GB. (explain)

GeForce GT 320		12960 Mtexels/sec
GeForce GT 430 1GB		11200 Mtexels/sec
	Difference: 1760 (16%)

Pixel Rate

The GeForce GT 320 should be a lot (about 54%) better at full screen anti-aliasing than the GeForce GT 430 1GB, and should be able to handle higher resolutions without slowing down too much. (explain)

GeForce GT 320		4320 Mpixels/sec
GeForce GT 430 1GB		2800 Mpixels/sec
	Difference: 1520 (54%)

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: Bandwidth is the maximum amount of data (in units of MB per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher 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 most pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.