Radeon RX 6900 XT vs Radeon RX Vega 64

Intro

Compare that to the Radeon RX Vega 64, which features GPU core 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 TAUs, and 64 Raster Operation Units.

Display Graphs

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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 will be 6% faster than the Radeon RX Vega 64 in general, because of its greater 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 quite a bit (approximately 83%) more effective 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

The Radeon RX 6900 XT is a lot (about 193%) better at FSAA than the Radeon RX Vega 64, and also should be capable of handling higher resolutions better. (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

Specifications

Memory Bandwidth: Bandwidth is the largest amount of data (in units of MB per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better 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 texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.