GeForce GTX 660 Ti vs Radeon R9 390X 8G

Intro

Compare those specifications to the Radeon R9 390X 8G, which has a core clock speed of 1050 MHz and a GDDR5 memory frequency of 1500 MHz. It also features a 512-bit bus, and makes use of a 28 nm design. It features 2816 SPUs, 176 Texture Address Units, and 64 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 390X 8G		13555 points
GeForce GTX 660 Ti		6013 points
	Difference: 7542 (125%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically, the Radeon R9 390X 8G should perform a lot faster than the GeForce GTX 660 Ti in general. (explain)

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

Texel Rate

The Radeon R9 390X 8G should be a lot (more or less 80%) faster with regards to AF than the GeForce GTX 660 Ti. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
GeForce GTX 660 Ti		102480 Mtexels/sec
	Difference: 82320 (80%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 390X 8G is a better choice, by a large margin. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
GeForce GTX 660 Ti		21960 Mpixels/sec
	Difference: 45240 (206%)

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 transported over the external memory interface in one second. The number is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 once 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 AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total number of texture units by the core 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.