Radeon RX 6600 XT vs Radeon RX Vega 64

Intro

Compare all that to the Radeon RX Vega 64, which comes with core 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 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600 XT		160 Watts
Radeon RX Vega 64		295 Watts
	Difference: 135 Watts (84%)

Memory Bandwidth

Theoretically speaking, the Radeon RX Vega 64 is 89% faster than the Radeon RX 6600 XT in general, due to its greater data rate. (explain)

Radeon RX Vega 64		495411 MB/sec
Radeon RX 6600 XT		262144 MB/sec
	Difference: 233267 (89%)

Texel Rate

The Radeon RX Vega 64 is a lot (about 27%) better at texture filtering than the Radeon RX 6600 XT. (explain)

Radeon RX Vega 64		319232 Mtexels/sec
Radeon RX 6600 XT		251904 Mtexels/sec
	Difference: 67328 (27%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon RX 6600 XT is a better choice, by a large margin. (explain)

Radeon RX 6600 XT		125952 Mpixels/sec
Radeon RX Vega 64		79808 Mpixels/sec
	Difference: 46144 (58%)

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: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This is calculated 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.