Radeon HD 6990 vs Radeon RX 5600 XT

Intro

Compare those specs to the Radeon RX 5600 XT, which has a GPU core clock speed of 1375 MHz, and 6144 MB of GDDR6 RAM running at 1500 MHz through a 192-bit bus. It also is comprised of 2304 SPUs, 144 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 5600 XT		160 Watts
Radeon HD 6990		375 Watts
	Difference: 215 Watts (134%)

Memory Bandwidth

In theory, the Radeon RX 5600 XT should be just a bit faster than the Radeon HD 6990 overall. (explain)

Radeon RX 5600 XT		344064 MB/sec
Radeon HD 6990		320000 MB/sec
	Difference: 24064 (8%)

Texel Rate

The Radeon RX 5600 XT will be much (approximately 24%) better at anisotropic filtering than the Radeon HD 6990. (explain)

Radeon RX 5600 XT		198000 Mtexels/sec
Radeon HD 6990		159360 Mtexels/sec
	Difference: 38640 (24%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon RX 5600 XT is superior to the Radeon HD 6990, and very much so. (explain)

Radeon RX 5600 XT		88000 Mpixels/sec
Radeon HD 6990		53120 Mpixels/sec
	Difference: 34880 (66%)

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 largest amount of information (in units of megabytes per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 number of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total number of texture units by the core 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 per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.