PSU power requirements are estimates. If you can run on one card, but not on two - then you have to wonder about the PSU (although there are other possible problems that could be causing this.
Power requirements are actually difficult to figure out. There's the surge that's needed when you start the system or startup new things - and then there's the power that's needed once the system is running.
Also, PSU's degrade with age - so one that's adequate when first purchased may not be adequate now.
BUT, I am not a hardware expert, so I would suggest posting over in the Internal Hardware forums for a more expert opinion: http://www.bleepingcomputer.com/forums/f/7/internal-hardware/
FWIW - the Admin log shows a number of errors. I suspect it's either a problem with the installer (?it may be corrupted?), a problem with customizations being done to the system, or that the hardware issues is forcing it to spit errors
Edited by usasma, 10 August 2016 - 07:12 AM.
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