GeForce GT 320 vs Radeon R9 390X 8G

Intro

Compare all of that to the Radeon R9 390X 8G, which comes with a GPU core clock speed of 1050 MHz, and 8192 MB of GDDR5 RAM set to run at 1500 MHz through a 512-bit bus. It also features 2816 SPUs, 176 TAUs, and 64 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Performance-wise, the Radeon R9 390X 8G should theoretically be much better than the GeForce GT 320 overall. (explain)

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

Texel Rate

The Radeon R9 390X 8G should be quite a bit (more or less 1326%) more effective at AF than the GeForce GT 320. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 171840 (1326%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 390X 8G is the winner, by far. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 62880 (1456%)

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 (measured in megabytes per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.