Asus P9X79 LE Ram Issue

xwmaxx

Prominent
Jun 5, 2017
4
0
520
Hey, my second time posting on the forums.

I am trying to help my brother with his 4 yr old computer that has an MB Asus P9X79 LE with G.Skills Ripjaws X DDR3 1866mhz 4GB ram. The problem is that the ram is running at 1600mhz instead of 1866mhz. When I went into the BIOS to set it to 1866mhz, the computer did run for a while, like 30 minutes but then it restarted and kept going into a restart loop. I had to switch it back to 1600mhz for the computer to run again without any restart issues. How do I fix it so that the computer can run the ram at 1866mhz?

MB: ASUS P9X79 LE
RAM: G.Skills Ripjaws X DDR3 4gb 1866mhz
CPU: Intel I7-3820 3.6GHZ