GeForce 8800 GTX vs GeForce GT 320

Intro

Compare all that 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 Stream Processors, 24 TAUs, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce 8800 GTX		155 Watts
	Difference: 112 Watts (260%)

Memory Bandwidth

Theoretically speaking, the GeForce 8800 GTX should perform a lot faster than the GeForce GT 320 overall. (explain)

GeForce 8800 GTX		86400 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 61120 (242%)

Texel Rate

The GeForce 8800 GTX should be quite a bit (approximately 184%) more effective at anisotropic filtering than the GeForce GT 320. (explain)

GeForce 8800 GTX		36800 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 23840 (184%)

Pixel Rate

The GeForce 8800 GTX is a lot (about 219%) faster with regards to anti-aliasing than the GeForce GT 320, and able to handle higher resolutions without losing too much performance. (explain)

GeForce 8800 GTX		13800 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 9480 (219%)

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 moved across the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.