Radeon RX 6800 XT vs Radeon RX Vega 64

Intro

Compare all that to the Radeon RX Vega 64, which uses a 14 nm design. AMD has clocked the core frequency at 1247 MHz. The HBM2 memory runs at a speed of 1890 MHz on this model. It features 4096 SPUs along with 256 TAUs and 64 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX Vega 64		295 Watts
Radeon RX 6800 XT		300 Watts
	Difference: 5 Watts (2%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6800 XT should be 6% quicker than the Radeon RX Vega 64 overall, due to its greater data rate. (explain)

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

Texel Rate

The Radeon RX 6800 XT will be quite a bit (more or less 65%) faster with regards to anisotropic filtering than the Radeon RX Vega 64. (explain)

Radeon RX 6800 XT		525600 Mtexels/sec
Radeon RX Vega 64		319232 Mtexels/sec
	Difference: 206368 (65%)

Pixel Rate

The Radeon RX 6800 XT is much (more or less 193%) better at anti-aliasing than the Radeon RX Vega 64, and also will be able to handle higher resolutions better. (explain)

Radeon RX 6800 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

Specifications

Memory Bandwidth: Bandwidth is the largest amount of information (in units of MB per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the card will be at 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 card could possibly write to its local memory in a 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 outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.