GeForce GT 320 vs Radeon R9 380 2G

Intro

Compare that to the Radeon R9 380 2G, which features GPU core speed of 970 MHz, and 2048 MB of GDDR5 memory set to run at 1425 MHz through a 256-bit bus. It also is comprised of 1792 Stream Processors, 112 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320		43 Watts
Radeon R9 380 2G		190 Watts
	Difference: 147 Watts (342%)

Memory Bandwidth

Performance-wise, the Radeon R9 380 2G should theoretically be quite a bit better than the GeForce GT 320 overall. (explain)

Radeon R9 380 2G		182400 MB/sec
GeForce GT 320		25280 MB/sec
	Difference: 157120 (622%)

Texel Rate

The Radeon R9 380 2G is a lot (more or less 738%) more effective at anisotropic filtering than the GeForce GT 320. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
GeForce GT 320		12960 Mtexels/sec
	Difference: 95680 (738%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 380 2G is a better choice, by a large margin. (explain)

Radeon R9 380 2G		31040 Mpixels/sec
GeForce GT 320		4320 Mpixels/sec
	Difference: 26720 (619%)

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 information (measured in MB per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 texture map elements (texels) that are applied in one second. This number is calculated 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.