By the way, welcome to the forum ....
Have you check in the Bios, if you have a disabled
any function like:
a save energy, EIST, ... ( see a weblink below ) if yes reactive the function... by choose enabled..
Maybe this change have a influence on your overclocking..
But he is possible to use a all saver energy technology functions (almost all) ...during overclocking.
Up to a point (to be discovered, according to the situation or state of your system).
Wait and see... as the case the result of these changes. ( Come back here with more infos...)
reduce a timing or voltage of ram, if possible...
In standard situation, keep normal (by default) a voltage ram. Or if you have modify a setting (timing-voltage) ram...
Give us more infos about this setting... tank.
Have you use a LLC ( Load line calibration ) in bios? Just a question. Please do not touch now. Wait for new instructions.
Basically I suggest you learn about the DownClocking and use in the bios options and parameters of energy saving technologies.
GIGABYTE Cares-Climate Savershttp://www.gigabyte.com/microsite/98/html/technology-guide-power-efficient-1.htm
What is a exact Brands and Model of your PSU? Please give us a weblink from Brand...