GeForce GTX 660 Ti vs Radeon R9 M385X

Intro

Compare all of that to the Radeon R9 M385X, which makes use of a 28 nm design. AMD has set the core speed at 1100 MHz. The GDDR5 RAM runs at a frequency of 1500 MHz on this model. It features 896 SPUs along with 56 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce GTX 660 Ti should perform a lot 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%) faster with regards to 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

The GeForce GTX 660 Ti will be a lot (more or less 25%) better at anti-aliasing than the Radeon R9 M385X, and also should be capable of handling higher screen resolutions while still performing well. (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: Bandwidth is the max amount of data (measured in MB per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total texture units of the card 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core speed of the card. 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 quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.