GeForce RTX 2060 vs Radeon HD 7990

Intro

Compare all of that to the Radeon HD 7990, which makes use of a 28 nm design. AMD has set the core frequency at 950 MHz. The GDDR5 memory is set to run at a frequency of 1500 MHz on this specific model. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 2060		160 Watts
Radeon HD 7990		375 Watts
	Difference: 215 Watts (134%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7990 should in theory be a lot better than the GeForce RTX 2060 overall. (explain)

Radeon HD 7990		576000 MB/sec
GeForce RTX 2060		344064 MB/sec
	Difference: 231936 (67%)

Texel Rate

The Radeon HD 7990 should be much (more or less 48%) more effective at anisotropic filtering than the GeForce RTX 2060. (explain)

Radeon HD 7990		243200 Mtexels/sec
GeForce RTX 2060		163800 Mtexels/sec
	Difference: 79400 (48%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce RTX 2060 is a better choice, not by a very large margin though. (explain)

GeForce RTX 2060		65520 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 4720 (8%)

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: Bandwidth is the max amount of information (in units of megabytes per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 number of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.