GeForce GT 320 vs Radeon R9 285

Intro

Compare those specifications to the Radeon R9 285, which uses a 28 nm design. AMD has set the core frequency at 918 MHz. The GDDR5 RAM runs at a frequency of 1375 MHz on this card. It features 1792 SPUs along with 112 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon R9 285		190 Watts
	Difference: 147 Watts (342%)

Memory Bandwidth

As far as performance goes, the Radeon R9 285 should theoretically be much superior to the GeForce GT 320 in general. (explain)

Radeon R9 285		176000 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 150720 (596%)

Texel Rate

The Radeon R9 285 is much (approximately 693%) more effective at anisotropic filtering than the GeForce GT 320. (explain)

Radeon R9 285		102816 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 89856 (693%)

Pixel Rate

The Radeon R9 285 will be a lot (about 580%) more effective at anti-aliasing than the GeForce GT 320, and able to handle higher screen resolutions while still performing well. (explain)

Radeon R9 285		29376 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 25056 (580%)

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 data (in units of megabytes per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.