[catexception]

You are correct that customers that already use both Intel and AMD would likely choose AMD over Intel even with a price difference of 10% if they were deciding on price/performance ratio. However, I think it's likely that AMD is trying to win market share from customers that are currently mostly using Intel. In my humble opinion that strategy is paying off now that more big shops such as Amazon AWS have AMD options.

[localhost]

Lisa Su is on record as talking about revenue / market share being a key focus:[1]

“We are always looking to increase our market share. That’s why we put out great products. As it relates to our market share targets, for server what we’ve said is we can achieve double digit market share from 4-6 quarters from the end of 2018.”

[1] https://www.anandtech.com/show/14579/all-ryzen-qa-with-amd-c...

[SteveNuts]

It's a smart decision in the era of public clouds, for sure. On-prem shops will be more hesitant because with things like VMware you can't hot move VMs between differing CPU architectures. In order to win these customers over you have to have longevity (that you'll still be the price/performance in 5 years when you lifecycle your hardware).