Radeon HD 6990 vs Radeon RX 5700

Intro

Compare those specs to the Radeon RX 5700, which makes use of a 7 nm design. AMD has clocked the core speed at 1465 MHz. The GDDR6 memory is set to run at a speed of 1750 MHz on this card. It features 2304 SPUs as well as 144 TAUs and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 5700		180 Watts
Radeon HD 6990		375 Watts
	Difference: 195 Watts (108%)

Memory Bandwidth

Performance-wise, the Radeon RX 5700 should in theory be a lot better than the Radeon HD 6990 in general. (explain)

Radeon RX 5700		458752 MB/sec
Radeon HD 6990		320000 MB/sec
	Difference: 138752 (43%)

Texel Rate

The Radeon RX 5700 will be quite a bit (about 32%) more effective at anisotropic filtering than the Radeon HD 6990. (explain)

Radeon RX 5700		210960 Mtexels/sec
Radeon HD 6990		159360 Mtexels/sec
	Difference: 51600 (32%)

Pixel Rate

The Radeon RX 5700 should be much (approximately 77%) faster with regards to FSAA than the Radeon HD 6990, and able to handle higher resolutions while still performing well. (explain)

Radeon RX 5700		93760 Mpixels/sec
Radeon HD 6990		53120 Mpixels/sec
	Difference: 40640 (77%)

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 megabytes per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.