GeForce GT 320 vs Radeon R9 285

Intro

Compare all of that to the Radeon R9 285, which features core speeds of 918 MHz on the GPU, and 1375 MHz on the 2048 MB of GDDR5 memory. It features 1792 SPUs as well as 112 Texture Address Units and 32 ROPs.

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

Theoretically speaking, the Radeon R9 285 will be 596% faster than the GeForce GT 320 in general, because of its higher bandwidth. (explain)

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

Texel Rate

The Radeon R9 285 is quite a bit (approximately 693%) faster with regards to texture filtering than the GeForce GT 320. (explain)

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

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 285 is a better choice, by far. (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 maximum amount of information (in units of megabytes per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 are applied per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics 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 most pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.