GeForce GT 320 vs GeForce GT 430 1GB

Intro

Compare those specifications to the GeForce GT 430 1GB, which comes with a core clock speed of 700 MHz and a GDDR3 memory speed of 900 MHz. It also features a 128-bit memory bus, and uses a 40 nm design. It is made up of 96 SPUs, 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 will be 14% quicker than the GeForce GT 320 in general, 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 will be a bit (about 16%) faster with regards to 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

If running with a high resolution is important to you, then the GeForce GT 320 is the winner, by far. (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 megabytes per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total number of texture units by the core 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 per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated 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 outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.