What is Core Parking? - Core Parking is a power saving feature, which stops some of your cores running.
Have you ever wondered why only your physical cores only run in games, and the HT threads are Parked?...This is due to this power saving feature.
Microsoft and Intel got together and park four cores to save power on Laptops. But in doing this they did it to all i7 CPU's running in Windows 7 & server 2008.
This the link is how to disable the core parking:
This the link is to download the nice little Program:
GIGABYTE-GA-X99-UD4 i7-5820K 3.30GHz, G.Skill 16gb DDR4 2133 Quad, HIS R9 290X IceQ X2 4GB, COOLER MASTER HAF 932, In-Win Glacier 900W, 2-240gb SSD Set in array, Win7 Ult-64bit, / M2 SSD 128gb, Win 10 64bit, 39" LED TV