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Radeon RX 6900 XT vs Radeon RX Vega 64

Intro

The Radeon RX 6900 XT uses a 7 nm design. AMD has set the core frequency at 1825 MHz. The GDDR6 RAM runs at a frequency of 2000 MHz on this model. It features 5120 SPUs as well as 320 TAUs and 128 ROPs.

Compare those specs to the Radeon RX Vega 64, which has a GPU core clock speed of 1247 MHz, and 8192 MB of HBM2 RAM set to run at 1890 MHz through a 2048-bit bus. It also is comprised of 4096 SPUs, 256 Texture Address Units, and 64 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX Vega 64 295 Watts
Radeon RX 6900 XT 300 Watts
Difference: 5 Watts (2%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6900 XT should be 6% quicker than the Radeon RX Vega 64 in general, due to its higher bandwidth. (explain)

Radeon RX 6900 XT 524288 MB/sec
Radeon RX Vega 64 495411 MB/sec
Difference: 28877 (6%)

Texel Rate

The Radeon RX 6900 XT should be a lot (approximately 83%) better at AF than the Radeon RX Vega 64. (explain)

Radeon RX 6900 XT 584000 Mtexels/sec
Radeon RX Vega 64 319232 Mtexels/sec
Difference: 264768 (83%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX 6900 XT is superior to the Radeon RX Vega 64, and very much so. (explain)

Radeon RX 6900 XT 233600 Mpixels/sec
Radeon RX Vega 64 79808 Mpixels/sec
Difference: 153792 (193%)

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 RX 6900 XT

Amazon.com

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Radeon RX Vega 64

Amazon.com

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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 RX 6900 XT Radeon RX Vega 64
Manufacturer AMD AMD
Year 2020 August 2017
Code Name Navi 21 Vega 10 XT
Memory 16384 MB 8192 MB
Core Speed 1825 MHz 1247 MHz
Memory Speed 2000 GB/s 1890 MHz
Power (Max TDP) 300 watts 295 watts
Bandwidth 524288 MB/sec 495411 MB/sec
Texel Rate 584000 Mtexels/sec 319232 Mtexels/sec
Pixel Rate 233600 Mpixels/sec 79808 Mpixels/sec
Unified Shaders 5120 4096
Texture Mapping Units 320 256
Render Output Units 128 64
Bus Type GDDR6 HBM2
Bus Width 256-bit 2048-bit
Fab Process 7 nm 14 nm
Transistors 26800 million 12500 million
Bus PCIe 4.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 12.0
OpenGL Version OpenGL 4.6 OpenGL 4.5

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in MB per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better 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 applied in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per 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. The number is worked out by multiplying the number of Raster Operations Pipelines 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 rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Radeon RX 6900 XT

Amazon.com

Check prices at:

Radeon RX Vega 64

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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