GeForce GT 320 vs GeForce GTX 285 1GB

Intro

Compare all that to the GeForce GTX 285 1GB, which makes use of a 55 nm design. nVidia has clocked the core speed at 648 MHz. The GDDR3 RAM runs at a speed of 1242 MHz on this model. It features 240 SPUs along with 80 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 161 Watts (374%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 285 1GB is 529% faster than the GeForce GT 320 overall, because of its higher bandwidth. (explain)

GeForce GTX 285 1GB		158976 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 133696 (529%)

Texel Rate

The GeForce GTX 285 1GB is quite a bit (about 300%) faster with regards to anisotropic filtering than the GeForce GT 320. (explain)

GeForce GTX 285 1GB		51840 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 38880 (300%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 285 1GB is superior to the GeForce GT 320, and very much so. (explain)

GeForce GTX 285 1GB		20736 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 16416 (380%)

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 largest amount of information (in units of megabytes per second) that can be transferred across the external memory interface in a second. The number 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 DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.