GeForce GT 320 vs Radeon R9 M385X

Intro

Compare those specifications to the Radeon R9 M385X, which has a core clock speed of 1100 MHz and a GDDR5 memory speed of 1500 MHz. It also features a 128-bit bus, and uses a 28 nm design. It is made up of 896 SPUs, 56 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon R9 M385X should theoretically be much better than the GeForce GT 320 in general. (explain)

Radeon R9 M385X		96000 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 70720 (280%)

Texel Rate

The Radeon R9 M385X is much (approximately 375%) better at anisotropic filtering than the GeForce GT 320. (explain)

Radeon R9 M385X		61600 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 48640 (375%)

Pixel Rate

The Radeon R9 M385X should be much (about 307%) more effective at AA than the GeForce GT 320, and also capable of handling higher screen resolutions more effectively. (explain)

Radeon R9 M385X		17600 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 13280 (307%)

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 (measured in MB per second) that can be moved across the external memory interface within a second. It's 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 DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the video 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 graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.