Radeon R9 380X vs Radeon RX 6800

Intro

Compare those specifications to the Radeon RX 6800, which makes use of a 7 nm design. AMD has set the core frequency at 1700 MHz. The GDDR6 RAM runs at a frequency of 2000 MHz on this specific model. It features 3840 SPUs along with 240 TAUs and 96 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380X		190 Watts
Radeon RX 6800		250 Watts
	Difference: 60 Watts (32%)

Memory Bandwidth

In theory, the Radeon RX 6800 will be 187% faster than the Radeon R9 380X overall, because of its higher data rate. (explain)

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

Texel Rate

The Radeon RX 6800 should be much (about 229%) faster with regards to AF than the Radeon R9 380X. (explain)

Radeon RX 6800		408000 Mtexels/sec
Radeon R9 380X		124160 Mtexels/sec
	Difference: 283840 (229%)

Pixel Rate

The Radeon RX 6800 should be quite a bit (about 426%) better at AA than the Radeon R9 380X, and will be able to handle higher resolutions better. (explain)

Radeon RX 6800		163200 Mpixels/sec
Radeon R9 380X		31040 Mpixels/sec
	Difference: 132160 (426%)

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 max amount of information (in units of megabytes per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it should 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 AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.