GeForce 9800 GT 1GB vs GeForce GT 320

Intro

Compare those specs to the GeForce GT 320, which has GPU clock speed of 540 MHz, and 1024 MB of GDDR3 RAM set to run at 790 MHz through a 128-bit bus. It also is comprised of 72 Stream Processors, 24 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
GeForce 9800 GT 1GB		105 Watts
	Difference: 62 Watts (144%)

Memory Bandwidth

Performance-wise, the GeForce 9800 GT 1GB should theoretically be a lot superior to the GeForce GT 320 in general. (explain)

GeForce 9800 GT 1GB		57600 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 32320 (128%)

Texel Rate

The GeForce 9800 GT 1GB should be a lot (approximately 159%) faster with regards to texture filtering than the GeForce GT 320. (explain)

GeForce 9800 GT 1GB		33600 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 20640 (159%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce 9800 GT 1GB is the winner, and very much so. (explain)

GeForce 9800 GT 1GB		9600 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 5280 (122%)

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 (counted in MB per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. 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 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 of the card by the core clock 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs 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 rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.