GeForce RTX 2080 Ti vs Radeon HD 7990

Intro

Compare those specs to the Radeon HD 7990, which has GPU clock speed of 950 MHz, and 3072 MB of GDDR5 memory running at 1500 MHz through a 384-bit bus. It also is made up of 2048 SPUs, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce RTX 2080 Ti		31381 points
Radeon HD 7990		15520 points
	Difference: 15861 (102%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Performance-wise, the GeForce RTX 2080 Ti should theoretically be just a bit superior to the Radeon HD 7990 overall. (explain)

GeForce RTX 2080 Ti		630784 MB/sec
Radeon HD 7990		576000 MB/sec
	Difference: 54784 (10%)

Texel Rate

The GeForce RTX 2080 Ti is quite a bit (approximately 51%) faster with regards to AF than the Radeon HD 7990. (explain)

GeForce RTX 2080 Ti		367200 Mtexels/sec
Radeon HD 7990		243200 Mtexels/sec
	Difference: 124000 (51%)

Pixel Rate

The GeForce RTX 2080 Ti should be much (approximately 95%) more effective at FSAA than the Radeon HD 7990, and also will be capable of handling higher resolutions while still performing well. (explain)

GeForce RTX 2080 Ti		118800 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 58000 (95%)

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 (measured in MB per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher 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 texture map elements (texels) that are processed in one second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, 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 graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.