GeForce GT 320 vs GeForce GTX 650

Intro

Compare those specs to the GeForce GTX 650, which makes use of a 28 nm design. nVidia has clocked the core frequency at 1058 MHz. The GDDR5 RAM runs at a frequency of 1250 MHz on this model. It features 384 SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce GTX 650		64 Watts
	Difference: 21 Watts (49%)

Memory Bandwidth

In theory, the GeForce GTX 650 will be 216% quicker than the GeForce GT 320 in general, due to its greater bandwidth. (explain)

GeForce GTX 650		80000 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 54720 (216%)

Texel Rate

The GeForce GTX 650 should be much (about 161%) faster with regards to anisotropic filtering than the GeForce GT 320. (explain)

GeForce GTX 650		33856 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 20896 (161%)

Pixel Rate

The GeForce GTX 650 should be quite a bit (approximately 292%) better at AA than the GeForce GT 320, and also able to handle higher resolutions more effectively. (explain)

GeForce GTX 650		16928 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 12608 (292%)

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 (counted in megabytes per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.