GeForce GT 320 vs Radeon R9 285

Intro

Compare all that to the Radeon R9 285, which uses a 28 nm design. AMD has set the core speed at 918 MHz. The GDDR5 memory works at a frequency of 1375 MHz on this particular model. It features 1792 SPUs along with 112 Texture Address Units 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

Performance-wise, the Radeon R9 285 should theoretically be quite a bit better than the GeForce GT 320 overall. (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 (more or less 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 is a lot (about 580%) better at anti-aliasing than the GeForce GT 320, and capable of handling higher screen resolutions without losing too much performance. (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 max amount of information (measured in megabytes per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.