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#11
If all three of them ran succesful with no hiccups, try running the CPU and Graphics both at the same time. If we experience a shutdown we can safely assume it is not software related with your games and it's likely hardware related.
I just noticed you said "i got the 600-650W used without my tower include."
Your system is very likely going over the 500 watt, i do not know how much it is requiring when going full load.
Since you got the power supply used the capacitators may be loosing efficiency and although it might have been a 650 PSU at one point not so much anymore.
This could very likely be the source of the problem.
Anyway you can find a friend that would let you borrow a power supply with much higher wattage rating?
If not how about unplugging as many possible cooling fans you can and still maintain proper airflow. Unplugging optional drives CD/DVD
I counted 6 Fans which could probably at max use 30~50 watts.
DVD drives possibly 20 watts
If any overclocking was done please revert it back to normal, overclocking really increases power consumption.