Radeon HD 6990 vs Radeon RX 6700 XT

Intro

Compare that to the Radeon RX 6700 XT, which makes use of a 7 nm design. AMD has clocked the core speed at 2321 MHz. The GDDR6 RAM is set to run at a speed of 2000 MHz on this specific model. It features 2560 SPUs as well as 160 TAUs and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6700 XT		230 Watts
Radeon HD 6990		375 Watts
	Difference: 145 Watts (63%)

Memory Bandwidth

In theory, the Radeon RX 6700 XT will be 23% quicker than the Radeon HD 6990 in general, due to its higher data rate. (explain)

Radeon RX 6700 XT		393216 MB/sec
Radeon HD 6990		320000 MB/sec
	Difference: 73216 (23%)

Texel Rate

The Radeon RX 6700 XT is much (more or less 133%) faster with regards to texture filtering than the Radeon HD 6990. (explain)

Radeon RX 6700 XT		371360 Mtexels/sec
Radeon HD 6990		159360 Mtexels/sec
	Difference: 212000 (133%)

Pixel Rate

The Radeon RX 6700 XT will be a lot (more or less 180%) more effective at anti-aliasing than the Radeon HD 6990, and also will be able to handle higher screen resolutions more effectively. (explain)

Radeon RX 6700 XT		148544 Mpixels/sec
Radeon HD 6990		53120 Mpixels/sec
	Difference: 95424 (180%)

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 over the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of 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 calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.