Radeon RX 6950 XT vs Radeon RX Vega 64

Intro

Compare those specifications to the Radeon RX Vega 64, which has a clock frequency of 1247 MHz and a HBM2 memory frequency of 1890 MHz. It also makes use of a 2048-bit bus, and uses a 14 nm design. It is comprised of 4096 SPUs, 256 Texture Address Units, 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 6950 XT		335 Watts
	Difference: 40 Watts (14%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 6950 XT should be 19% faster than the Radeon RX Vega 64 in general, because of its greater data rate. (explain)

Radeon RX 6950 XT		589824 MB/sec
Radeon RX Vega 64		495411 MB/sec
	Difference: 94413 (19%)

Texel Rate

The Radeon RX 6950 XT should be quite a bit (more or less 93%) faster with regards to AF than the Radeon RX Vega 64. (explain)

Radeon RX 6950 XT		616000 Mtexels/sec
Radeon RX Vega 64		319232 Mtexels/sec
	Difference: 296768 (93%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon RX 6950 XT is superior to the Radeon RX Vega 64, and very much so. (explain)

Radeon RX 6950 XT		246400 Mpixels/sec
Radeon RX Vega 64		79808 Mpixels/sec
	Difference: 166592 (209%)

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 maximum amount of information (in units of megabytes per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 are processed in one second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.