GeForce GT 320 vs Radeon HD 6990

Intro

Compare those specs to the Radeon HD 6990, which uses a 40 nm design. AMD has set the core speed at 830 MHz. The GDDR5 memory runs at a frequency of 1250 MHz on this model. It features 1536 SPUs along with 96 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon HD 6990		375 Watts
	Difference: 332 Watts (772%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6990 should theoretically be much better than the GeForce GT 320 in general. (explain)

Radeon HD 6990		320000 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 294720 (1166%)

Texel Rate

The Radeon HD 6990 should be a lot (more or less 1130%) faster with regards to anisotropic filtering than the GeForce GT 320. (explain)

Radeon HD 6990		159360 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 146400 (1130%)

Pixel Rate

The Radeon HD 6990 should be quite a bit (approximately 1130%) faster with regards to FSAA than the GeForce GT 320, and also should be able to handle higher resolutions more effectively. (explain)

Radeon HD 6990		53120 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 48800 (1130%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster 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 per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.