GeForce GT 130 vs GeForce GT 320

Intro

Compare those specs to the GeForce GT 320, which comes with GPU core speed of 540 MHz, and 1024 MB of GDDR3 memory running at 790 MHz through a 128-bit bus. It also features 72 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce GT 130		75 Watts
	Difference: 32 Watts (74%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 320 should perform much faster than the GeForce GT 130 overall. (explain)

GeForce GT 320		25280 MB/sec
GeForce GT 130		12000 MB/sec
	Difference: 13280 (111%)

Texel Rate

The GeForce GT 320 should be a little bit (more or less 8%) more effective at anisotropic filtering than the GeForce GT 130. (explain)

GeForce GT 320		12960 Mtexels/sec
GeForce GT 130		12000 Mtexels/sec
	Difference: 960 (8%)

Pixel Rate

The GeForce GT 130 is quite a bit (more or less 85%) faster with regards to AA than the GeForce GT 320, and also will be capable of handling higher screen resolutions better. (explain)

GeForce GT 130		8000 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 3680 (85%)

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 max amount of data (in units of megabytes 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 its memory speed. If the card has DDR RAM, it must 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 number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.