You wrote that you tried to change the timing,multiplier,voltage still nothing its like resetting to default.
There are a few steps involved.
First, set the System Voltage Control from Auto to Manual.
Then change DRAM voltage from Auto to 1.65v for that particular memory.
Second, In the Motherboard Intelligent Tweaker, M.I.T menu you need to change the
Set Memory Clock setting from Auto to Manual. Then you can set the Memory Clock to X8.00
Third, you go to the DDR3 Timing Items, change that from Auto to Manual. Then set Command Timings to 2T. Then set the next four settings beginning with the CAS# Latency to the recommended timings (9-9-9-27).
Save and Exit BIOS.
