Radeon R9 280X vs Radeon RX 6600 XT

Intro

Compare all of that to the Radeon RX 6600 XT, which has GPU core speed of 1968 MHz, and 8192 MB of GDDR6 memory set to run at 2000 MHz through a 128-bit bus. It also is made up of 2048 Stream Processors, 128 Texture Address Units, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600 XT		160 Watts
Radeon R9 280X		250 Watts
	Difference: 90 Watts (56%)

Memory Bandwidth

In theory, the Radeon R9 280X is 10% faster than the Radeon RX 6600 XT overall, because of its greater bandwidth. (explain)

Radeon R9 280X		288000 MB/sec
Radeon RX 6600 XT		262144 MB/sec
	Difference: 25856 (10%)

Texel Rate

The Radeon RX 6600 XT should be much (about 132%) better at anisotropic filtering than the Radeon R9 280X. (explain)

Radeon RX 6600 XT		251904 Mtexels/sec
Radeon R9 280X		108800 Mtexels/sec
	Difference: 143104 (132%)

Pixel Rate

The Radeon RX 6600 XT should be a lot (approximately 363%) more effective at AA than the Radeon R9 280X, and also will be able to handle higher screen resolutions better. (explain)

Radeon RX 6600 XT		125952 Mpixels/sec
Radeon R9 280X		27200 Mpixels/sec
	Difference: 98752 (363%)

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 data (in units of megabytes per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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