GeForce GTX 660 vs Radeon R9 380 2G

Intro

Compare all that to the Radeon R9 380 2G, which features core speeds of 970 MHz on the GPU, and 1425 MHz on the 2048 MB of GDDR5 memory. It features 1792 SPUs along with 112 Texture Address Units and 32 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R9 380 2G		8850 points
GeForce GTX 660		5063 points
	Difference: 3787 (75%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660		140 Watts
Radeon R9 380 2G		190 Watts
	Difference: 50 Watts (36%)

Memory Bandwidth

As far as performance goes, the Radeon R9 380 2G should in theory be a lot better than the GeForce GTX 660 in general. (explain)

Radeon R9 380 2G		182400 MB/sec
GeForce GTX 660		144192 MB/sec
	Difference: 38208 (26%)

Texel Rate

The Radeon R9 380 2G should be a lot (about 39%) more effective at anisotropic filtering than the GeForce GTX 660. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
GeForce GTX 660		78400 Mtexels/sec
	Difference: 30240 (39%)

Pixel Rate

The Radeon R9 380 2G should be a lot (approximately 32%) more effective at AA than the GeForce GTX 660, and also capable of handling higher screen resolutions more effectively. (explain)

Radeon R9 380 2G		31040 Mpixels/sec
GeForce GTX 660		23520 Mpixels/sec
	Difference: 7520 (32%)

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 max amount of data (in units of megabytes per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher 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 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units 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 output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.