Radeon RX 6600 XT vs Radeon RX Vega 64

Intro

Compare those specs to the Radeon RX Vega 64, which makes use of a 14 nm design. AMD has set the core frequency at 1247 MHz. The HBM2 memory runs at a speed of 1890 MHz on this particular card. It features 4096 SPUs along with 256 Texture Address Units and 64 Rasterization Operator Units.

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

The Radeon RX Vega 64, in theory, should perform quite a bit faster than the Radeon RX 6600 XT overall. (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 should be a lot (more or less 27%) more effective at anisotropic 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

The Radeon RX 6600 XT will be quite a bit (more or less 58%) better at anti-aliasing than the Radeon RX Vega 64, and should be able to handle higher resolutions more effectively. (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: Bandwidth is the max amount of data (in units of MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the 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 amount of texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

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