GeForce GT 320 vs Radeon R9 M280X

Intro

Compare that to the Radeon R9 M280X, which comes with a clock frequency of 900 MHz and a GDDR5 memory speed of 1375 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It is comprised of 896 SPUs, 56 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon R9 M280X		75 Watts
	Difference: 32 Watts (74%)

Memory Bandwidth

In theory, the Radeon R9 M280X is 248% faster than the GeForce GT 320 in general, due to its higher bandwidth. (explain)

Radeon R9 M280X		88000 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 62720 (248%)

Texel Rate

The Radeon R9 M280X is quite a bit (about 289%) better at AF than the GeForce GT 320. (explain)

Radeon R9 M280X		50400 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 37440 (289%)

Pixel Rate

The Radeon R9 M280X is a lot (about 233%) more effective at anti-aliasing than the GeForce GT 320, and should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 M280X		14400 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 10080 (233%)

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 max amount of data (in units of megabytes per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 most pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.