GeForce GTX 660 vs Radeon R9 380 4G

Intro

Compare all of that to the Radeon R9 380 4G, which features GPU core speed of 970 MHz, and 4096 MB of GDDR5 RAM running at 1425 MHz through a 256-bit bus. It also is comprised of 1792 SPUs, 112 Texture Address Units, and 32 Raster Operation Units.

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 4G		8837 points
GeForce GTX 660		5063 points
	Difference: 3774 (75%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660		140 Watts
Radeon R9 380 4G		190 Watts
	Difference: 50 Watts (36%)

Memory Bandwidth

The Radeon R9 380 4G, in theory, should perform much faster than the GeForce GTX 660 overall. (explain)

Radeon R9 380 4G		182400 MB/sec
GeForce GTX 660		144192 MB/sec
	Difference: 38208 (26%)

Texel Rate

The Radeon R9 380 4G is a lot (about 39%) more effective at AF than the GeForce GTX 660. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
GeForce GTX 660		78400 Mtexels/sec
	Difference: 30240 (39%)

Pixel Rate

The Radeon R9 380 4G is quite a bit (approximately 32%) better at AA than the GeForce GTX 660, and also should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 380 4G		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: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the 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 number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, 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 record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.