GeForce RTX 2080 Ti vs Radeon HD 7990

Intro

Compare those specifications to the Radeon HD 7990, which comes with a core clock speed of 950 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 384-bit memory bus, and uses a 28 nm design. It is comprised 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 in theory be 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 will be much (approximately 51%) better at texture filtering than the Radeon HD 7990. (explain)

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

Pixel Rate

If using high levels of AA is important to you, then the GeForce RTX 2080 Ti is superior to the Radeon HD 7990, by a large margin. (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 max amount of data (measured in MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the interface width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.