GeForce GTX 660 Ti vs Radeon R9 M385X

Intro

Compare those specifications to the Radeon R9 M385X, which has clock speeds of 1100 MHz on the GPU, and 1500 MHz on the 4096 MB of GDDR5 RAM. It features 896 SPUs along with 56 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the GeForce GTX 660 Ti should be much faster than the Radeon R9 M385X overall. (explain)

GeForce GTX 660 Ti		144000 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 48000 (50%)

Texel Rate

The GeForce GTX 660 Ti is much (more or less 66%) more effective at anisotropic filtering than the Radeon R9 M385X. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon R9 M385X		61600 Mtexels/sec
	Difference: 40880 (66%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 660 Ti is superior to the Radeon R9 M385X, by a large margin. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
Radeon R9 M385X		17600 Mpixels/sec
	Difference: 4360 (25%)

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 megabytes per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high 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 amount of texture units by the core clock speed of the chip. The higher this number, 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 most pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's 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 is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.