Radeon HD 6990 vs Radeon RX 5600 XT

Intro

Compare all that to the Radeon RX 5600 XT, which features a clock speed of 1375 MHz and a GDDR6 memory speed of 1500 MHz. It also features a 192-bit memory bus, and makes use of a 7 nm design. It is comprised of 2304 SPUs, 144 TAUs, and 64 Raster Operation Units.

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

Performance-wise, the Radeon RX 5600 XT should in theory be a small bit better 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 (about 24%) better at AF than the Radeon HD 6990. (explain)

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

Pixel Rate

The Radeon RX 5600 XT should be much (more or less 66%) better at anti-aliasing than the Radeon HD 6990, and also will be capable of handling higher resolutions while still performing well. (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: Bandwidth is the maximum amount of information (in units of MB per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. 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 number of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better 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 the video card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few 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.