GeForce GT 320 vs Radeon R9 390 8G

Intro

Compare those specs to the Radeon R9 390 8G, which has core speeds of 1000 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 memory. It features 2560 SPUs as well as 160 TAUs and 64 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon R9 390 8G		275 Watts
	Difference: 232 Watts (540%)

Memory Bandwidth

In theory, the Radeon R9 390 8G is 1419% faster than the GeForce GT 320 in general, due to its higher bandwidth. (explain)

Radeon R9 390 8G		384000 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 358720 (1419%)

Texel Rate

The Radeon R9 390 8G should be much (more or less 1135%) more effective at texture filtering than the GeForce GT 320. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 147040 (1135%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R9 390 8G is the winner, by a large margin. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 59680 (1381%)

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: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. 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 get to the max fill rate.