GeForce GTX 1660 Ti vs Radeon R9 M390X

Intro

Compare that to the Radeon R9 M390X, which uses a 28 nm design. AMD has clocked the core frequency at 723 MHz. The GDDR5 RAM works at a frequency of 1250 MHz on this particular model. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 1660 Ti		120 Watts
Radeon R9 M390X		125 Watts
	Difference: 5 Watts (4%)

Memory Bandwidth

The GeForce GTX 1660 Ti should in theory perform a lot faster than the Radeon R9 M390X overall. (explain)

GeForce GTX 1660 Ti		294912 MB/sec
Radeon R9 M390X		160000 MB/sec
	Difference: 134912 (84%)

Texel Rate

The GeForce GTX 1660 Ti is quite a bit (about 56%) better at texture filtering than the Radeon R9 M390X. (explain)

GeForce GTX 1660 Ti		144000 Mtexels/sec
Radeon R9 M390X		92544 Mtexels/sec
	Difference: 51456 (56%)

Pixel Rate

The GeForce GTX 1660 Ti will be quite a bit (more or less 211%) better at FSAA than the Radeon R9 M390X, and will be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 1660 Ti		72000 Mpixels/sec
Radeon R9 M390X		23136 Mpixels/sec
	Difference: 48864 (211%)

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 information (in units of megabytes per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, 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 worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at 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 card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.