Random reboots with any video card other than integrated video

[kgeissler]

Weird issue here....my current setup:
MB: MSI H67MA-E35 (B3)
CPU: i7-3770k
Video: Integrated Intel HD Graphics 4000
8GB Ram
Crucial 256GB SSD
Win 8.1
Athena 400W PSU Model: AP-MPS3ATX40
Dual Asus VE247 monitors


About a month ago, I decided to upgrade my CPU from an i3-2100 to the current i7-3770k. At the time I had an old Radeon 5550 video card, running 2 monitors, both hooked up to DVI. After upgrading to the new CPU, I would get random reboots watching any videos after about 2-3 minutes. No BSOD, no entries in the event viewer (except for event id 41). So I decided to hookup the integrated video on the motherboard and everything played fine and works like a champ. Except one monitor was on HDMI and one on DVI. I decided since the video card was old, I would get a new one, so I bought a Sapphire R7-250X, put it in, plugged both monitors into DVI and started getting the same random reboots. I returned it, and thought that maybe there was some conflict with AMD, so I bought a Gigabyte GTX 750. Put that in with both monitors on DVI and the reboots happen again.

I don't play any games. I do watch live tv from my HDHomerun and use GoPro Studio quite a bit and that is when the reboots happen. Don't happen when web surfing or doing any non video app.

I have run WIndows Memory checker which showed no memory errors.

Any ideas?

TIA

 

[smorizio]

it your power supply..it starting to fail..not hold the system up under load. look to replace it with a good 600-650 if you want to put a gpu and a higher end cpu in it and not have the rig shut down.

 

[kgeissler]

I purchased a 600w Cosair power supply, put it in, along with the GTX 750 and TV played for an hour with no reboots. Guess the power supply was the problem. I thought for sure 400w would have been enough.

 

[smorizio]

400w is the total output..it broken into 12v rail..3.3 and 5v. and with any computer part your never going to get 100 percent out of it. a good unit you may get 80 percent out before it starts over heating or rippling out. if you force a supply more then 80 percent of it outout it can just up and pop. if it pops it can kill your rig.