Radeon R9 380X vs Radeon RX 6800 XT

Intro

Compare all that to the Radeon RX 6800 XT, which features a core clock speed of 1825 MHz and a GDDR6 memory frequency of 2000 MHz. It also makes use of a 256-bit memory bus, and uses a 7 nm design. It features 4608 SPUs, 288 Texture Address Units, and 128 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380X		190 Watts
Radeon RX 6800 XT		300 Watts
	Difference: 110 Watts (58%)

Memory Bandwidth

In theory, the Radeon RX 6800 XT is 187% quicker than the Radeon R9 380X in general, due to its higher bandwidth. (explain)

Radeon RX 6800 XT		524288 MB/sec
Radeon R9 380X		182400 MB/sec
	Difference: 341888 (187%)

Texel Rate

The Radeon RX 6800 XT will be much (about 323%) faster with regards to anisotropic filtering than the Radeon R9 380X. (explain)

Radeon RX 6800 XT		525600 Mtexels/sec
Radeon R9 380X		124160 Mtexels/sec
	Difference: 401440 (323%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX 6800 XT is the winner, by a large margin. (explain)

Radeon RX 6800 XT		233600 Mpixels/sec
Radeon R9 380X		31040 Mpixels/sec
	Difference: 202560 (653%)

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 (counted in MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 applied in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.