We get a lot of questions about Oracle’s processor core factors. Core factors can change and this is particularly difficult when you’re the person in charge of tracking changes in licensing or the procurement process. Case and point, the Sun UltraSPARC T2+ core processor licensing changed from 0.75 to 0.50. As soon as the change is in effect, your organization is considered out of compliance.
See Oracle Processor Core Factor Table, which charts vendor and core processor licensing factors. Changes can be found as a footnote at the bottom of the page.