Cuckatoo31 is a special mining algorithm used by Grin known for its high requirements. At first Cuckatoo31 was not against ASICs and was designed to fight against them in the future. For now high-end graphics cards by Nvidia and AMD with a large amount of RAM, like GTX 1080 Ti and RTX 2080 Ti, are able to handle the algorithm. The exclusiveness of the algorithm affects mining performance. Grin on Cuckatoo31 is usually the most profitable coin for mining on powerful graphics cards.