"I'm super excited to announce that a top 10 customer has already signed up on this model with us, a more than $500 million a year of revenue for a three year agreement," said Sumit Sadana, Micron's chief business officer at the company's investor day event.

He declined to project how much of the long-term agreements with customers would migrate to this new model of pricing, and emphasized that this was an "experiment". He said the current long-term agreements are based on volume and not on prices. The forward pricing agreements have both volume and pricing.

When asked about whether the contracts would be enforceable Sadana acknowledged that one party or the other would always be on the wrong side of the price.

Sadana also said that Micron does not plan to lower its gross margins to push the forward pricing agreements ahead.

"There'll be ups and downs, but the benefits ultimately outweigh the risks of actually doing an agreement like this," said Sadana.

(Reporting By Jane Lanhee Lee in San Francisco, and Chavi Mehta in Bangalore; Editing by Nick Zieminski)

By Jane Lanhee Lee and Chavi Mehta