GeForce GT 320 vs GeForce GTX 580

Intro

Compare all of that to the GeForce GTX 580, which comes with a core clock speed of 772 MHz and a GDDR5 memory speed of 1002 MHz. It also features a 384-bit memory bus, and makes use of a 40 nm design. It is made up of 512 SPUs, 64 TAUs, and 48 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce GTX 580		244 Watts
	Difference: 201 Watts (467%)

Memory Bandwidth

The GeForce GTX 580 should in theory be a lot faster than the GeForce GT 320 overall. (explain)

GeForce GTX 580		192384 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 167104 (661%)

Texel Rate

The GeForce GTX 580 is much (approximately 281%) faster with regards to texture filtering than the GeForce GT 320. (explain)

GeForce GTX 580		49408 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 36448 (281%)

Pixel Rate

The GeForce GTX 580 is much (approximately 758%) more effective at FSAA than the GeForce GT 320, and also will be capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTX 580		37056 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 32736 (758%)

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 largest amount of data (in units of megabytes per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better 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 maximum amount of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.