Solved 2 blown mobos in 6 months - any advice please guru's?

I try to keep in mind that thousand of untrained people read our post. One must be careful. My training with lots of amps and volts started years ago in the U.S. Navy. Most readers probably don't have that training. It's kind of like sky diving. Trial and error is not the best method.
 

My Computer My Computer

At a glance

Windows 10 Pro. 64/ version 1709 Windows 7 Pr...Intel i7-6800K @ 4.3Corsair Platinum 16 gig @2400EVGA GTX 1070 OC
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Home made Desktop
OS
Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64
CPU
Intel i7-6800K @ 4.3
Motherboard
ASUS X-99 Deluxe II
Memory
Corsair Platinum 16 gig @2400
Graphics Card(s)
EVGA GTX 1070 OC
Monitor(s) Displays
Asus 27" LED LCD/VE278Q
Screen Resolution
1920-1080 or 1280-720 HDMI
Hard Drives
INTEL SSD 730-240 Gb Sata 3.0/
PSU
EVGA Platium 1200W
Case
Phanteks Luxe Tempered Glass 8 fans/ one radiator
Cooling
XSPC/ Water Cooled CPU
Keyboard
Das 4 Professional
Mouse
Logitech M705/MX Anywhere 2-S
Internet Speed
100 mbits
Antivirus
Microsoft Security Essentials/ Malwarebytes Premium 3.0/ SAS
Browser
I.E. 11 default/Firefox/ ISP Time Warner Cable/Spectrum
Other Info
LG BluRay Burner/
Sound system-KLipsch-THX/
Icy Dock ssd Hot Swap bays.

My Computer My Computer

At a glance

Win7 Home Premium 64xIntel Core 2 Duo P7450 / 2.13 GHz (2.29 with ...4 GB PC-6400 Hyundai (2X2) at 800MhzNVIDIA GeForce GTX 260M 1GB DDR3 VRAM
Computer type
Laptop
Computer Manufacturer/Model Number
ASUS G60-RBBX05
OS
Win7 Home Premium 64x
CPU
Intel Core 2 Duo P7450 / 2.13 GHz (2.29 with Extreme Turbo)
Memory
4 GB PC-6400 Hyundai (2X2) at 800Mhz
Graphics Card(s)
NVIDIA GeForce GTX 260M 1GB DDR3 VRAM
Monitor(s) Displays
16" LED Backlit
Screen Resolution
1366 x 768 on laptop 1600x1050 max res on 22" external mon
Hard Drives
OCZ Agility 3 60GB SSD / 320 GB - Serial ATA-150 - 7200 rpm
PSU
6-cell Lithium ion { lasts 1.5 hours }
Case
ASUS G60 Laptop
Keyboard
Chicklet type back-lit (white light) keyboard
Mouse
Logitech G9 Laser Mouse 3200dpi and 1000 reports per minute
Internet Speed
Comcast 8.60mb/s up - 3.11mb/s down
Antivirus
MSE
Browser
Firefox
Other Info
General mid-budget gaming Comp. Low batterylife - High FrameRates - currently overheating problems :(

2nd Rig: Case: Rosewill BLACKHAWK Gaming ATX Mid Tower Computer Case

Mobo: GIGABYTE GA-990FXA-UD3
CPU: AMD FX-6200 Zambezi 3.8GHz (4.1GHz Turbo)
Heatsink: COOLER MASTER V8 CPU Cooler
RAM: Patriot Viper 3 8GB (2 x 4GB) 240-Pin DDR3 SDRAM 1866 (PC3 15000)
GPU: SAPPHIRE Radeon HD 6850 1GB 2
I don insist on opening the psu, but actually there is nothing to be afraid of.
just dont touch the capacitors, and check the fuse.
Ever wondered what "NO USER SERVICEABLE PARTS INSIDE" means? If you open the PSU and it is under warranty you just voided it. Frankly your comments are not wanted on checking the fuse. I for one would not like to find out that someone followed my advice and was hurt or worse. As far as we are concerned a power supply is a magic sealed box that gets replaced when it fails or is suspect. We will let people who work on isolated AC supplies with insulated floors and test equipment work on them. I know I did it for the best part of 30 years. There are people of all ages and abilities on here so remember that and if you can't give safe advice on the subject move on to one you can.
 

My Computer My Computer

At a glance

Windows 7 x64 Ultimate and numerous virtual m...AMD FX-8350 Vishera 32nm Technology @ 4.2 GHz...G Skill 32.0GB Dual-Channel DDR3 @ 1204MHz (1...EVGA GeForce GTX 960 4GB Super SC ACX 2.0+ wi...
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Bluethunder II
OS
Windows 7 x64 Ultimate and numerous virtual machines
CPU
AMD FX-8350 Vishera 32nm Technology @ 4.2 GHz default
Motherboard
ASUSTeK COMPUTER INC. SABERTOOTH 990FX R2.0 (Socket 942)
Memory
G Skill 32.0GB Dual-Channel DDR3 @ 1204MHz (11-13-13-31)
Graphics Card(s)
EVGA GeForce GTX 960 4GB Super SC ACX 2.0+ with Back Plate
Sound Card
Creative X-Fi Titanium HD Audiophile PCIe
Monitor(s) Displays
LG L227WTG x 3
Screen Resolution
1680 x 1050 16:10
Hard Drives
238GB Samsung850 PRO SATA Disk Device (SSD)
1863GB Seagate ST2000DM 001-1CH164 (SATA)
1397GB Seagate ST1500DL 003-9VT16L(SATA)
466GB Western Digital WDC WD50 03AZEX-00K1GA0 (SATA) x 2
932GB Seagate ST310005 28AS SATA Disk Device (SATA)
PSU
Enermax Revolution87+ 1000 Watts Gold Certified Power Supply
Case
Rocketfish Full Tower
Cooling
Cooler Master Hyper 212 EVO Push Pull 120mm Fans
Keyboard
Logitech K740
Mouse
Logitech G100S Laser LED + Logitech Gamepad F310
Internet Speed
500 mbs down and 30mbs up
Antivirus
Malwarebytes Pro & Avast and MSE on certain Virtual Machines
Browser
Firefox (Main) Chrome, Internet Explorer (Back Up)
Other Info
Logitech X 230 2.1 Stereo System and 5.1 Yamaha RX V2090
B&W DM6 Monitor Speakers + Center and Surround Speakers
Using Mouse Without Borders (Google it)
that was good, thanx,
As i said its a common device u can find in lots of electrical devices.
to simplify the act, it changes the 110vAC or 220VAc into 5vDC, so it has capacitor and diods to change AC to DC and a transformer to reduce the voltage, the thing you should keep aware of is the capacitor which may charged from the last use. as it holds DC voltage if its heads shortcut that may cause harm. any high voltage capacitor are dangerous that doesnt mean you must not explore the device and loot it as a mysterious box. these notes are for alerting. i should correct myself, dont touch these carelessly guys, but always explore things with delicacy
 

My Computer My Computer

At a glance

Windows 7 Ultimate x64core i7.
OS
Windows 7 Ultimate x64
CPU
core i7.
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