GeForce GTX 1660 Ti vs Radeon R9 390 8G

Intro

Compare those specifications to the Radeon R9 390 8G, which comes with a clock speed of 1000 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 512-bit memory bus, and uses a 28 nm design. It features 2560 SPUs, 160 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 1660 Ti		120 Watts
Radeon R9 390 8G		275 Watts
	Difference: 155 Watts (129%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390 8G will be 30% quicker than the GeForce GTX 1660 Ti overall, due to its greater bandwidth. (explain)

Radeon R9 390 8G		384000 MB/sec
GeForce GTX 1660 Ti		294912 MB/sec
	Difference: 89088 (30%)

Texel Rate

The Radeon R9 390 8G is a small bit (approximately 11%) more effective at texture filtering than the GeForce GTX 1660 Ti. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
GeForce GTX 1660 Ti		144000 Mtexels/sec
	Difference: 16000 (11%)

Pixel Rate

The GeForce GTX 1660 Ti will be a bit (about 13%) better at anti-aliasing than the Radeon R9 390 8G, and should be capable of handling higher resolutions more effectively. (explain)

GeForce GTX 1660 Ti		72000 Mpixels/sec
Radeon R9 390 8G		64000 Mpixels/sec
	Difference: 8000 (13%)

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 largest amount of data (measured in MB per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 amount of texture map elements (texels) that are processed per second. This is worked out by multiplying the total amount 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number 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 fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.