Radeon R9 285 vs Radeon RX 6600

Intro

Compare all that to the Radeon RX 6600, which makes use of a 7 nm design. AMD has set the core speed at 1626 MHz. The GDDR6 memory runs at a speed of 1750 MHz on this model. It features 1792 SPUs as well as 112 Texture Address Units and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 6600		132 Watts
Radeon R9 285		190 Watts
	Difference: 58 Watts (44%)

Memory Bandwidth

In theory, the Radeon RX 6600 should be 30% faster than the Radeon R9 285 in general, because of its higher bandwidth. (explain)

Radeon RX 6600		229376 MB/sec
Radeon R9 285		176000 MB/sec
	Difference: 53376 (30%)

Texel Rate

The Radeon RX 6600 should be much (about 77%) faster with regards to anisotropic filtering than the Radeon R9 285. (explain)

Radeon RX 6600		182112 Mtexels/sec
Radeon R9 285		102816 Mtexels/sec
	Difference: 79296 (77%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon RX 6600 is a better choice, and very much so. (explain)

Radeon RX 6600		104064 Mpixels/sec
Radeon R9 285		29376 Mpixels/sec
	Difference: 74688 (254%)

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 maximum amount of information (counted in MB per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of 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 higher this number, 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 most pixels the graphics card can 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 the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.