XFX Radeon HD 6970 Video cards Causing Power Failure

[emiyot]

Any time I put some load onto my video cards (I have two of the same in cross fire) my system at the power supply shuts off. I then have to manually reboot the power supply to get the computer to work again. Also I have included two readings, one from GPU temp, the other from CPUID HW

Mother Board: Asus M4A89TD PRO/USB3
Cpu: AMD Phenom II X6 1090T Black Edition
Hard Drive: Hitachi Deskstar 7K3000 2TB
Memory: G.SKILL Ripjaws X Series DDR3 1600MHz (PC3-12800) 16GB (4x4GB0
PSU: Corsair HX850 Gold Certified

 

[Alex Whitfield]

Have you overclocked anything and also how old is this build/power supply?
This looks like something is unstable and the pc is shutting down to avoid damages.
Either one of the cards is unstable or the power supply is failing to supply that much power and the psu is shutting off because of it.

 

[emiyot]

the power supply is less than a year old, the rest of the build is a little over 4 years, and nothing is over clocked.

 

[Alex Whitfield]

If so than one of the graphics cards is possibly unstable.
The psu is a reliablebrand and has plenty watts to offer this build.
Try unhooking a graphics card put it under load than do same to the other and see your results.
If when under load is when it fails and the power supply is a type of psu that will shut things down if it senses something out of order (it is to avoid damages) so my educated guess is one of those cards has become unstable under load.

 

[emiyot]

is it possible for the 3volt mot being at or near 3volts to be the problem?

 

[Alex Whitfield]

Yes very much so that is probably the problem.
You see when something is maxed to begin with and a load comes along it could cause permanent damage.
Your psu as I said is designed to detect such things and shut off to avoid hurting something.
Your psu probably senses that part being overwhelmed and is most likely switching off to avoid killing it.

 

[emiyot]

it seems that the bios may have been outdated, or possibly one of the drivers as i updated everything, including bios and it seems to have fixed its self.

 

[Alex Whitfield]

Than yes something was unstable and not getting along and the updates sorted it out.
I would still do something about maxing out that 3 volt if I was you just in case.