GeForce GTX 660 Ti vs Radeon R9 M380

Intro

Compare those specifications to the Radeon R9 M380, which features GPU core speed of 1000 MHz, and 4096 MB of GDDR5 memory running at 1500 MHz through a 128-bit bus. It also is comprised of 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 660 Ti should in theory be much faster than the Radeon R9 M380 overall. (explain)

GeForce GTX 660 Ti		144000 MB/sec
Radeon R9 M380		96000 MB/sec
	Difference: 48000 (50%)

Texel Rate

The GeForce GTX 660 Ti should be a lot (about 156%) faster with regards to anisotropic filtering than the Radeon R9 M380. (explain)

GeForce GTX 660 Ti		102480 Mtexels/sec
Radeon R9 M380		40000 Mtexels/sec
	Difference: 62480 (156%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 660 Ti is a better choice, by far. (explain)

GeForce GTX 660 Ti		21960 Mpixels/sec
Radeon R9 M380		16000 Mpixels/sec
	Difference: 5960 (37%)

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 (measured in megabytes per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is calculated by multiplying the total texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount 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 filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.