Reducing Windows Server per core license costs
I'd welcome comments on the following method which in certain circumstances appears to reduce new Windows Server license costs by 21%
This only works if;
(a) You have active SA
(b) You have 8-core per proc servers licensed with Datacenter
(c) You want to deploy net-new servers with more than 8 cores per proc (e.g 12-core per proc server, as is now common)
(d) You don't need to immediately deploy 2016.
Assume your new server is 2-processor, 12 cores per processor. Rather than buying 24 cores to cover the new server you can instead just buy 16. You assign those 16 new cores to the old server (which meets the minimum core requirements of 8 per proc, 16 per server). The old licenses can then be assigned to the new 24-core server - providing you're not running 2016 on it.
At the end of your agreement period you declare the number of cores in use on the new server (24) and Microsoft grant 8 additional cores to cover the shortfall - at the cost of SA coverage.
Based on current pricing this seems to yield a saving of around 21% - a worthwhile saving for not much work or admin overhead?