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Radeon R9 Nano vs Radeon RX 6900 XT

Intro

The Radeon R9 Nano features a clock frequency of 1000 MHz and a HBM memory frequency of 500 MHz. It also uses a 4096-bit memory bus, and uses a 28 nm design. It is made up of 4096 SPUs, 256 Texture Address Units, and 64 ROPs.

Compare that to the Radeon RX 6900 XT, which makes use of a 7 nm design. AMD has set the core speed at 1825 MHz. The GDDR6 memory works at a speed of 2000 MHz on this card. It features 5120 SPUs along with 320 TAUs and 128 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 Nano 175 Watts
Radeon RX 6900 XT 300 Watts
Difference: 125 Watts (71%)

Memory Bandwidth

In theory, the Radeon RX 6900 XT should perform a bit faster than the Radeon R9 Nano overall. (explain)

Radeon RX 6900 XT 524288 MB/sec
Radeon R9 Nano 512000 MB/sec
Difference: 12288 (2%)

Texel Rate

The Radeon RX 6900 XT should be much (more or less 128%) more effective at AF than the Radeon R9 Nano. (explain)

Radeon RX 6900 XT 584000 Mtexels/sec
Radeon R9 Nano 256000 Mtexels/sec
Difference: 328000 (128%)

Pixel Rate

The Radeon RX 6900 XT should be much (about 265%) more effective at FSAA than the Radeon R9 Nano, and also able to handle higher screen resolutions while still performing well. (explain)

Radeon RX 6900 XT 233600 Mpixels/sec
Radeon R9 Nano 64000 Mpixels/sec
Difference: 169600 (265%)

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.

Price Comparison

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Radeon R9 Nano

Amazon.com

Check prices at:

Radeon RX 6900 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 R9 Nano Radeon RX 6900 XT
Manufacturer AMD AMD
Year September 2015 2020
Code Name Fiji XT Navi 21
Memory 4096 MB 16384 MB
Core Speed 1000 MHz 1825 MHz
Memory Speed 500 MHz 4000 GB/s
Power (Max TDP) 175 watts 300 watts
Bandwidth 512000 MB/sec 524288 MB/sec
Texel Rate 256000 Mtexels/sec 584000 Mtexels/sec
Pixel Rate 64000 Mpixels/sec 233600 Mpixels/sec
Unified Shaders 4096 5120
Texture Mapping Units 256 320
Render Output Units 64 128
Bus Type HBM GDDR6
Bus Width 4096-bit 256-bit
Fab Process 28 nm 7 nm
Transistors 8900 million 26800 million
Bus PCIe 3.0 x16 PCIe 4.0 x16
DirectX Version DirectX 12.0 DirectX 12
OpenGL Version OpenGL 4.5 OpenGL 4.6

Memory Bandwidth: Bandwidth is the max amount of data (counted in MB per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon R9 Nano

Amazon.com

Check prices at:

Radeon RX 6900 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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