I've been monitoring your conversation:
i5-4670
DZ87KLT-70K
Kingston Predator KHX18C9T2K2/8X
SSD 520 - 480 GB
HDD Seagate - 2TB (ST2000VX002-1AH1)
ATI Sapphire HD 7850 2GB 256-bit GDDR5
BIOS - 0344
IDU - 3.2.6.068a
Intel ME - 9.0.5.1367
Problem is the same: Super I/O (SIO) controlled by Nuvoton NCT6683 reports through IDU that is over threshold (68 C) within a few minutes of gameplay. Climbs to 73 and stays there. When game is closed it returns to 67 C. Looks like 67 C is standard operational temperature: when computer starts temperature climbs to 67 C and stays there. All other temperature reports are (from my point of view) within normal working parameters - nothing abnormal.
No problems in computers performance.