GeForce GTX 660 Ti vs Radeon R9 390 8G

Intro

Compare those specifications to the Radeon R9 390 8G, which comes with core clock speeds of 1000 MHz on the GPU, and 1500 MHz on the 8192 MB of GDDR5 RAM. It features 2560 SPUs along with 160 TAUs and 64 Rasterization Operator 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 390 8G		12733 points
GeForce GTX 660 Ti		6013 points
	Difference: 6720 (112%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 Ti		150 Watts
Radeon R9 390 8G		275 Watts
	Difference: 125 Watts (83%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390 8G will be 167% quicker than the GeForce GTX 660 Ti overall, due to its higher bandwidth. (explain)

Radeon R9 390 8G		384000 MB/sec
GeForce GTX 660 Ti		144000 MB/sec
	Difference: 240000 (167%)

Texel Rate

The Radeon R9 390 8G is much (approximately 56%) better at AF than the GeForce GTX 660 Ti. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
GeForce GTX 660 Ti		102480 Mtexels/sec
	Difference: 57520 (56%)

Pixel Rate

The Radeon R9 390 8G will be much (about 191%) more effective at anti-aliasing than the GeForce GTX 660 Ti, and also should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
GeForce GTX 660 Ti		21960 Mpixels/sec
	Difference: 42040 (191%)

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 (counted in MB per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 amount of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.