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Radeon HD 6990 vs Radeon RX 6500 XT

Intro

The Radeon HD 6990 comes with a GPU core speed of 830 MHz, and the 2048 MB of GDDR5 memory is set to run at 1250 MHz through a 256-bit bus. It also is made up of 1536 Stream Processors, 96 TAUs, and 32 ROPs.

Compare those specs to the Radeon RX 6500 XT, which uses a 6 nm design. AMD has set the core speed at 2200 MHz. The GDDR6 RAM is set to run at a speed of 2250 MHz on this specific model. It features 1024 SPUs as well as 64 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6500 XT 107 Watts
Radeon HD 6990 375 Watts
Difference: 268 Watts (250%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6990 should theoretically be much superior to the Radeon RX 6500 XT in general. (explain)

Radeon HD 6990 320000 MB/sec
Radeon RX 6500 XT 147456 MB/sec
Difference: 172544 (117%)

Texel Rate

The Radeon HD 6990 should be just a bit (more or less 13%) more effective at anisotropic filtering than the Radeon RX 6500 XT. (explain)

Radeon HD 6990 159360 Mtexels/sec
Radeon RX 6500 XT 140800 Mtexels/sec
Difference: 18560 (13%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon RX 6500 XT is superior to the Radeon HD 6990, by far. (explain)

Radeon RX 6500 XT 70400 Mpixels/sec
Radeon HD 6990 53120 Mpixels/sec
Difference: 17280 (33%)

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

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Radeon HD 6990

Amazon.com

Check prices at:

Radeon RX 6500 XT

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon HD 6990 Radeon RX 6500 XT
Manufacturer AMD AMD
Year March 2011 January 2022
Code Name Antilles Navi 24 XT
Memory 2048 MB (x2) 4096 MB
Core Speed 830 MHz (x2) 2200 MHz
Memory Speed 5000 MHz (x2) 4500 GB/s
Power (Max TDP) 375 watts 107 watts
Bandwidth 320000 MB/sec 147456 MB/sec
Texel Rate 159360 Mtexels/sec 140800 Mtexels/sec
Pixel Rate 53120 Mpixels/sec 70400 Mpixels/sec
Unified Shaders 1536 (x2) 1024
Texture Mapping Units 96 (x2) 64
Render Output Units 32 (x2) 32
Bus Type GDDR5 GDDR6
Bus Width 256-bit (x2) 64-bit
Fab Process 40 nm 6 nm
Transistors 2640 million 5400 million
Bus PCIe 2.1 x16 PCIe 4.0 x16
DirectX Version DirectX 11 DirectX 12
OpenGL Version OpenGL 4.1 OpenGL 4.6

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock 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 maximum amount of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 6990

Amazon.com

Check prices at:

Radeon RX 6500 XT

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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