I built a new system using a Gigabyte GA-P55A-UD4P Motherboard and Corsair CMX8GX3M4A1600C9 Memory (8gb kit).  After the install i kept getting random BSOD (Blues Screen of Death) reboots.   I tried letting the bios auto detect the sticks and the system defaults to 1333mhz.  I tried allowing the BIOS to enable the XMP profile which recognizes them as 1600mhz (which they are rated at). I also tried other bios settings and was still experiencing random reboots.  I even ran memtest86+ for over 10 hours and the memory checked out fine; also ran prime95 for several hours and the system was rock solid. I did extensive troubleshooting within windows (examining minidumps, changing drivers, etc) to no avail.  I even bought a new kit of the same RAM and ran the same tests, same problem.  At this point, you would think, the ram was not compatible with this board but after extensive searching i found the following page on Tomshardware:
http://www.tomshardware.com/forum/266033-30-ud3r-random-reboots

(NOTE: Tom’s Hardware won’t let me directly link to it so copy and paste the link to see it)

Take note of Bilbat’s post and craigusoz post. The instability with this Corsair RAM and the Gigabyte boards seems to have to do with the CPU EIST / C1E / C3/6/7 / turbo boost support functions found in the BIOS.


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My problems were solved tweaking these bios settings. Turing on or off some of these CPU power saving functions may not be ideal but were good enough for me.  100% stable now.

Note: I was experiencing random BSOD on windows 7 x64. my board is GA-P55A-UD4P and my memory was Corsair CMX8GX3M4A1600C9 XMS3 8 GB PC3-12800 Core i5 Memory Kit
8gb kit was CMX8GX3M4A1600C9.