Radeon HD 7990 vs Radeon RX 5700 XT

Intro

Compare those specs to the Radeon RX 5700 XT, which makes use of a 7 nm design. AMD has set the core frequency at 1605 MHz. The GDDR6 memory is set to run at a frequency of 1750 MHz on this card. It features 2560 SPUs as well as 160 TAUs and 64 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 5700 XT		225 Watts
Radeon HD 7990		375 Watts
	Difference: 150 Watts (67%)

Memory Bandwidth

Theoretically, the Radeon HD 7990 should perform a lot faster than the Radeon RX 5700 XT overall. (explain)

Radeon HD 7990		576000 MB/sec
Radeon RX 5700 XT		458752 MB/sec
	Difference: 117248 (26%)

Texel Rate

The Radeon RX 5700 XT will be a little bit (more or less 6%) better at anisotropic filtering than the Radeon HD 7990. (explain)

Radeon RX 5700 XT		256800 Mtexels/sec
Radeon HD 7990		243200 Mtexels/sec
	Difference: 13600 (6%)

Pixel Rate

The Radeon RX 5700 XT is a lot (approximately 69%) more effective at anti-aliasing than the Radeon HD 7990, and also capable of handling higher screen resolutions better. (explain)

Radeon RX 5700 XT		102720 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 41920 (69%)

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 maximum amount of information (measured in megabytes per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.