what have done - and HOW!?

No sir, not in this instance we think. We have come to the conclusion that it is a voltage regulator problem. We might be way off, but looking up the problem we were experiencing on the web we found a number of people who had the same situation in that one processor seems somehow to KILL the board it is added to, and any subsequent processor inserted on that and then any other board, including the working original also dies. We have three boards here, two of which were working fine, until I put a different Skt 775 processor in to test it out on a (then) working board. Putting the original processors back in these working boards did not return anything to a normal state. So, we now have three dead processors and/or three dead boards. My retired electronics engineer hubby brought up the function of voltage regulators, and I spent some time on the Hardware Secrets site looking up and learning about chokes and voltage regulators and wotnot. I didn't see any thing on there to explain or confirm that a voltage mis-match to the CPU/ LGA could be a possible cause, but it seems possible...for now it is all on the back-burner as we have other jobs piling up, but if I ever get a definitive answer, I will post my discovery on here.
 

My Computer My Computer

At a glance

win seven 32, win seven 64intel dual-core/i54GB/8GBboth Nvidia
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Novatech / Homebuilt
OS
win seven 32, win seven 64
CPU
intel dual-core/i5
Motherboard
MSI/Gigabyte
Memory
4GB/8GB
Graphics Card(s)
both Nvidia
Sound Card
realtek/ummm
Monitor(s) Displays
dell widescreen
Screen Resolution
16-something x something
Hard Drives
lots!
Please do and hopefully some of the components still have life in them !
 

My Computer My Computer

At a glance

Windows 7 Ultimate 64i7 3770k OC'd 4.6 @ 1.17v, also FX 8120 & i5 ...32 gb G.Skill Sniper DDR3 10-12-12-31 @ 2133XFX Radeon 7870 2GB DDR5
Computer type
PC/Desktop
Computer Manufacturer/Model Number
A blend of brains, brawn and dumb luck.
OS
Windows 7 Ultimate 64
CPU
i7 3770k OC'd 4.6 @ 1.17v, also FX 8120 & i5 miniITX
Motherboard
MSI P67A-GD80 b3
Memory
32 gb G.Skill Sniper DDR3 10-12-12-31 @ 2133
Graphics Card(s)
XFX Radeon 7870 2GB DDR5
Sound Card
Sound Blaster Z Series Card
Monitor(s) Displays
(2) LG LED 23" 1920 x 1080 2ms Monitors via mini d-port
Screen Resolution
1680 X 1050 p
Hard Drives
Samsung 256 gb 830 SSD sata III
(1) 1 tb WD Black
(2) 1 tb Hitachi deskmates/sata II
(2) 1 tb WD green/sata II
(2) 3 tb Seagate Barracuda
(1) 120 gb OCZ Vertex SS
(1) Drobo 5N w/5 Seagate 3tb
PSU
EVGA modular 1000G2 80% gold rating & APC 1200 RS
Case
CoolerMaster Storm Styker
Cooling
7 case fans 140mm & 120mm, NZXT Kraken X60
Keyboard
(2) Logitech Illuminated Keyboards (1) usb (1) wireless
Mouse
Logitech G700 & T-BC21 - nano nx for the laptop
Internet Speed
Basic 120mbps down
Antivirus
Trend Micro Titanium Max Security & Malwarebytes Premium
Browser
Chrome and IE 10
Other Info
5 Noctua case fans + 3 Noctua in p/p on NZXT cooler
Integrated hot swap drive bays for 2.5" Drives
(2) Lite-on dvd/cd/Blu Ray optical 22X
Integrated fan controller and led on/off
HP Officejet Pro 8630 all-n-one
Hot-swappable 3.5" hard drive bay
Netgear Nighthawk router
Asus USB 3 & sata 6 PCIe card
Vantec IDE to sata adptr./Ultra sata adptr
Lenovo L420 i5 lappy with m sata
Drobo 5N advanced NAS
will do Linne
 

My Computer My Computer

At a glance

win seven 32, win seven 64intel dual-core/i54GB/8GBboth Nvidia
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Novatech / Homebuilt
OS
win seven 32, win seven 64
CPU
intel dual-core/i5
Motherboard
MSI/Gigabyte
Memory
4GB/8GB
Graphics Card(s)
both Nvidia
Sound Card
realtek/ummm
Monitor(s) Displays
dell widescreen
Screen Resolution
16-something x something
Hard Drives
lots!
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