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Radeon RX 6800 vs Radeon RX Vega 64

Intro

The Radeon RX 6800 comes with core speeds of 1700 MHz on the GPU, and 2000 MHz on the 16384 MB of GDDR6 RAM. It features 3840 SPUs along with 240 Texture Address Units and 96 Rasterization Operator Units.

Compare those specifications to the Radeon RX Vega 64, which has clock speeds of 1247 MHz on the GPU, and 1890 MHz on the 8192 MB of HBM2 memory. It features 4096 SPUs along with 256 Texture Address Units and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6800 250 Watts
Radeon RX Vega 64 295 Watts
Difference: 45 Watts (18%)

Memory Bandwidth

The Radeon RX 6800, in theory, should be a little bit faster than the Radeon RX Vega 64 in general. (explain)

Radeon RX 6800 524288 MB/sec
Radeon RX Vega 64 495411 MB/sec
Difference: 28877 (6%)

Texel Rate

The Radeon RX 6800 should be much (more or less 28%) better at texture filtering than the Radeon RX Vega 64. (explain)

Radeon RX 6800 408000 Mtexels/sec
Radeon RX Vega 64 319232 Mtexels/sec
Difference: 88768 (28%)

Pixel Rate

The Radeon RX 6800 is a lot (more or less 104%) better at anti-aliasing than the Radeon RX Vega 64, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon RX 6800 163200 Mpixels/sec
Radeon RX Vega 64 79808 Mpixels/sec
Difference: 83392 (104%)

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 6800

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.

Specifications

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Model Radeon RX 6800 Radeon RX Vega 64
Manufacturer AMD AMD
Year November 2020 August 2017
Code Name Navi 21 Vega 10 XT
Memory 16384 MB 8192 MB
Core Speed 1700 MHz 1247 MHz
Memory Speed 2000 GB/s 1890 MHz
Power (Max TDP) 250 watts 295 watts
Bandwidth 524288 MB/sec 495411 MB/sec
Texel Rate 408000 Mtexels/sec 319232 Mtexels/sec
Pixel Rate 163200 Mpixels/sec 79808 Mpixels/sec
Unified Shaders 3840 4096
Texture Mapping Units 240 256
Render Output Units 96 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: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This 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 graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

Radeon RX 6800

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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