GeForce RTX 2060 vs Radeon HD 7990

Intro

Compare those specifications to the Radeon HD 7990, which features clock speeds of 950 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 RAM. It features 2048 SPUs as well as 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

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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

Performance-wise, the Radeon HD 7990 should in theory be a lot superior to the GeForce RTX 2060 in general. (explain)

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

Texel Rate

The Radeon HD 7990 is much (approximately 48%) better at AF than the GeForce RTX 2060. (explain)

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

Pixel Rate

The GeForce RTX 2060 will be a little bit (about 8%) faster with regards to full screen anti-aliasing than the Radeon HD 7990, and also should be capable of handling higher screen resolutions without slowing down too much. (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: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock 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 is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.