Have you checked your BIOS settings?
Might want to re-set CMOS also.
+1 on this advice.
Keep in mind this is not a "flash the BIOS" suggestion. This is simply a more thorough method of resetting the BIOS defaults and clearing up any issues with hardware enumeration at the BIOS level.
The key is the event where Windows needed to reinstall all of your hardware drivers. This indicates that Windows thinks that all of your hardware is new or changed. That could happen if the BIOS was interrupted/corrupted during the power failure.
In both a "Reset BIOS Defaults" and a "CLR CMOS" procedure you are not changing or "flashing" the BIOS chip and risking the dangers of doing that procedure. These procedures simple "clean install" the existing BIOS instructions and re-enumerate your hardware fresh.
My Computer
At a glance
Windows 7 64 Bit Home Premium SP1i7-3820GSkill F3-14900CL9Q - 16GBEVGA GeForce GTX660 - Driver 352.86
- Computer type
- PC/Desktop
- Computer Manufacturer/Model Number
- Home Built - Jan 2013
- OS
- Windows 7 64 Bit Home Premium SP1
- CPU
- i7-3820
- Motherboard
- Asus P9X79-PRO - Bios 4608
- Memory
- GSkill F3-14900CL9Q - 16GB
- Graphics Card(s)
- EVGA GeForce GTX660 - Driver 352.86
- Sound Card
- On board Realtek ALC898
- Monitor(s) Displays
- Acer S271HL
- Screen Resolution
- 1920 x 1080
- Hard Drives
- #1- Samsung 840 Pro Series
#2- Western Digital WD1002FAEX Sata3 Black
#3- Western Digital WD1002FAEX Sata3 Black
- PSU
- Corsair CMPSU-850TX-V2 - 850 watt (by Seasonic)
- Case
- Corsair Obsidian 550D
- Cooling
- Standard 3 120mm case fans, Cooler Master Hyper 212 EVO
- Keyboard
- MS KC-0405
- Mouse
- Intellimouse 5-button
- Internet Speed
- 56 Mbits/Sec (on a good day)
- Antivirus
- Avast & Malwarebytes
- Browser
- Firefox
- Other Info
- Asus DVD - DRW-24B1ST 24X