Core licenses will be sold in packs of two. Each processor will need to be licensed with minimum of 8 physical cores which is 4 two-core packs. Each physical server will have to have all of its physical cores fully licensed. For scenarios with core densities greater than 8 cores per processor cores can then be licensed in increments of two cores (one two core pack) for gradual increases in core density growth.
Standard Edition provides rights for up to one virtual OSEs when all physical cores on a server are licensed (minimum of 8 cores per proc) and Datacenter Edition maintains unlimited virtualization.