GeForce 9800 GT 1GB vs GeForce GT 320

Intro

Compare all that to the GeForce GT 320, which has core speeds of 540 MHz on the GPU, and 790 MHz on the 1024 MB of GDDR3 RAM. It features 72 SPUs along with 24 TAUs and 8 ROPs.

Display Graphs

Hide Graphs

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

In theory, the GeForce 9800 GT 1GB should be 128% quicker than the GeForce GT 320 overall, because of its greater bandwidth. (explain)

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

Texel Rate

The GeForce 9800 GT 1GB will be a lot (about 159%) better at 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

The GeForce 9800 GT 1GB is much (more or less 122%) better at FSAA than the GeForce GT 320, and also will be capable of handling higher screen resolutions without losing too much performance. (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 maximum amount of information (counted in megabytes per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one 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 the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.