Radeon R9 380X vs Radeon RX 6800 XT

Intro

Compare all of that to the Radeon RX 6800 XT, which has core speeds of 1825 MHz on the GPU, and 2000 MHz on the 16384 MB of GDDR6 memory. It features 4608 SPUs along with 288 TAUs and 128 Rasterization Operator Units.

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 should be 187% faster than the Radeon R9 380X overall, because of 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 a lot (approximately 323%) more effective at AF than the Radeon R9 380X. (explain)

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

Pixel Rate

The Radeon RX 6800 XT will be much (about 653%) faster with regards to AA than the Radeon R9 380X, and also will be able to handle higher screen resolutions while still performing well. (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 max amount of data (measured in MB per second) that can be moved across the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's 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 texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.