GeForce GTX 1660 Ti vs Radeon HD 7990

Intro

Compare that to the Radeon HD 7990, which features core clock speeds of 950 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 memory. It features 2048 SPUs as well as 128 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 1660 Ti		120 Watts
Radeon HD 7990		375 Watts
	Difference: 255 Watts (213%)

Memory Bandwidth

In theory, the Radeon HD 7990 should perform much faster than the GeForce GTX 1660 Ti overall. (explain)

Radeon HD 7990		576000 MB/sec
GeForce GTX 1660 Ti		294912 MB/sec
	Difference: 281088 (95%)

Texel Rate

The Radeon HD 7990 will be much (approximately 69%) more effective at anisotropic filtering than the GeForce GTX 1660 Ti. (explain)

Radeon HD 7990		243200 Mtexels/sec
GeForce GTX 1660 Ti		144000 Mtexels/sec
	Difference: 99200 (69%)

Pixel Rate

The GeForce GTX 1660 Ti is a bit (about 18%) faster with regards to AA than the Radeon HD 7990, and also capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 1660 Ti		72000 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 11200 (18%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.