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Radeon R9 Nano vs Radeon RX 6900 XT

Intro

The Radeon R9 Nano uses a 28 nm design. AMD has set the core speed at 1000 MHz. The HBM RAM is set to run at a speed of 500 MHz on this model. It features 4096 SPUs as well as 256 Texture Address Units and 64 Rasterization Operator Units.

Compare all of that to the Radeon RX 6900 XT, which has a core clock frequency of 1825 MHz and a GDDR6 memory frequency of 2000 MHz. It also uses a 256-bit bus, and uses a 7 nm design. It is made up of 5120 SPUs, 320 Texture Address Units, and 128 Raster Operation Units.

Display Graphs

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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 small bit faster than the Radeon R9 Nano in general. (explain)

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

Texel Rate

The Radeon RX 6900 XT will be much (approximately 128%) better at anisotropic filtering 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 will be quite a bit (about 265%) better at full screen anti-aliasing than the Radeon R9 Nano, and also will be able to handle higher screen resolutions without slowing down too much. (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

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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 largest amount of information (in units of megabytes per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach 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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