GeForce RTX 2080 SUPER vs Radeon HD 7990

Intro

Compare those specifications to the Radeon HD 7990, which makes use of a 28 nm design. AMD has clocked the core speed at 950 MHz. The GDDR5 RAM runs at a frequency of 1500 MHz on this particular model. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 2080 SUPER		250 Watts
Radeon HD 7990		375 Watts
	Difference: 125 Watts (50%)

Memory Bandwidth

In theory, the Radeon HD 7990 is 13% faster than the GeForce RTX 2080 SUPER in general, due to its higher data rate. (explain)

Radeon HD 7990		576000 MB/sec
GeForce RTX 2080 SUPER		507904 MB/sec
	Difference: 68096 (13%)

Texel Rate

The GeForce RTX 2080 SUPER should be a lot (more or less 30%) faster with regards to AF than the Radeon HD 7990. (explain)

GeForce RTX 2080 SUPER		316800 Mtexels/sec
Radeon HD 7990		243200 Mtexels/sec
	Difference: 73600 (30%)

Pixel Rate

The GeForce RTX 2080 SUPER should be a lot (approximately 74%) more effective at FSAA than the Radeon HD 7990, and also will be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce RTX 2080 SUPER		105600 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 44800 (74%)

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 max amount of data (measured in MB per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the graphics 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 number of pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.