GeForce GT 320 vs Radeon HD 7950

Intro

Compare all that to the Radeon HD 7950, which features a GPU core clock speed of 800 MHz, and 1536 MB of GDDR5 memory set to run at 1250 MHz through a 384-bit bus. It also features 1792 SPUs, 112 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 7950		200 Watts
	Difference: 157 Watts (365%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7950 should theoretically be quite a bit superior to the GeForce GT 320 in general. (explain)

Radeon HD 7950		240000 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 214720 (849%)

Texel Rate

The Radeon HD 7950 is a lot (more or less 591%) faster with regards to texture filtering than the GeForce GT 320. (explain)

Radeon HD 7950		89600 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 76640 (591%)

Pixel Rate

The Radeon HD 7950 will be quite a bit (more or less 493%) better at anti-aliasing than the GeForce GT 320, and also able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 7950		25600 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 21280 (493%)

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 information (in units of MB per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at handling 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 per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.