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Radeon RX 6800 XT vs Radeon RX Vega 56

Intro

The Radeon RX 6800 XT has core clock speeds of 1825 MHz on the GPU, and 2000 MHz on the 16384 MB of GDDR6 memory. It features 4608 SPUs as well as 288 Texture Address Units and 128 ROPs.

Compare those specs to the Radeon RX Vega 56, which has a clock frequency of 1156 MHz and a HBM2 memory frequency of 1600 MHz. It also makes use of a 2048-bit memory bus, and uses a 14 nm design. It features 3584 SPUs, 224 Texture Address Units, and 64 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX Vega 56 210 Watts
Radeon RX 6800 XT 300 Watts
Difference: 90 Watts (43%)

Memory Bandwidth

In theory, the Radeon RX 6800 XT should perform quite a bit faster than the Radeon RX Vega 56 in general. (explain)

Radeon RX 6800 XT 524288 MB/sec
Radeon RX Vega 56 419430 MB/sec
Difference: 104858 (25%)

Texel Rate

The Radeon RX 6800 XT is a lot (approximately 103%) better at anisotropic filtering than the Radeon RX Vega 56. (explain)

Radeon RX 6800 XT 525600 Mtexels/sec
Radeon RX Vega 56 258944 Mtexels/sec
Difference: 266656 (103%)

Pixel Rate

The Radeon RX 6800 XT is a lot (more or less 216%) faster with regards to full screen anti-aliasing than the Radeon RX Vega 56, and should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon RX 6800 XT 233600 Mpixels/sec
Radeon RX Vega 56 73984 Mpixels/sec
Difference: 159616 (216%)

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 XT

Amazon.com

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Radeon RX Vega 56

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 6800 XT Radeon RX Vega 56
Manufacturer AMD AMD
Year November 2020 September 2017
Code Name Navi 21 Vega 10 XL
Memory 16384 MB 8192 MB
Core Speed 1825 MHz 1156 MHz
Memory Speed 2000 GB/s 1600 MHz
Power (Max TDP) 300 watts 210 watts
Bandwidth 524288 MB/sec 419430 MB/sec
Texel Rate 525600 Mtexels/sec 258944 Mtexels/sec
Pixel Rate 233600 Mpixels/sec 73984 Mpixels/sec
Unified Shaders 4608 3584
Texture Mapping Units 288 224
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: Memory bandwidth is the max amount of information (counted in MB per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 again. If 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, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core 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 rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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Radeon RX 6800 XT

Amazon.com

Check prices at:

Radeon RX Vega 56

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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