I preordered 3 i9900Ks - 2 of them were silicon lottery winners - 5.0 all cores, no issue, no heat, minimal additional voltage - the 3rd was throttling at 4.9 all cores - Exact same motherboard, exact same paste, exact same cooler. Returned it, the replacement was much better, but not to the level of the other 2. Alot to be said for getting lucky."At 1.45v for 5-5.1 GHz, that’s a full 100mv more than what I use at 5.4 GHz on my CPU that loves to eat voltage. "
Easy with golden sample and $1200 motherboard, now take 10 random units from any retailer and make them to run at 1.35V with 5.4GHz and motherboard under $250