Radeon RX 470 vs Radeon RX 6800

Intro

Compare all that to the Radeon RX 6800, which comes with a GPU core clock speed of 1700 MHz, and 16384 MB of GDDR6 RAM set to run at 2000 MHz through a 256-bit bus. It also features 3840 SPUs, 240 Texture Address Units, and 96 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470		120 Watts
Radeon RX 6800		250 Watts
	Difference: 130 Watts (108%)

Memory Bandwidth

In theory, the Radeon RX 6800 will be 148% faster than the Radeon RX 470 overall, due to its greater data rate. (explain)

Radeon RX 6800		524288 MB/sec
Radeon RX 470		211200 MB/sec
	Difference: 313088 (148%)

Texel Rate

The Radeon RX 6800 will be much (approximately 244%) faster with regards to AF than the Radeon RX 470. (explain)

Radeon RX 6800		408000 Mtexels/sec
Radeon RX 470		118528 Mtexels/sec
	Difference: 289472 (244%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon RX 6800 is a better choice, by a large margin. (explain)

Radeon RX 6800		163200 Mpixels/sec
Radeon RX 470		29632 Mpixels/sec
	Difference: 133568 (451%)

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 megabytes per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 can be applied per second. This number is worked out by multiplying the total 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 processed per second.

Pixel Rate: Pixel rate is the most pixels the video 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 amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.