Hello, This problem seems to only happen when Gaming The System is an Acer Quad core with a newly replaced Saphire Graphics Card. ( we thought it was the Graphice car problem , the new one works fine) the system hangs then dies , Happens repeatedly.
Acer Aspire M3800 4 GB Ram 64 Bit Win 7 Intel 2 Quad Q8200 @ 2.33 Ghz Ati Radeon 5700 Series with Catalyst 11. 1
More aboutsystem hanging repeatedly
Wattage of PSU. Unplug the cables, take out the card and blow some air on the PCI slot
Wattage of CPU is 500 Watt . Supposedly sufficient according to Acer and the retailers.
System did this with old xfx series 4600 HD card too ( Which I still have and don't need SIGH!)
It is of course sufficient but it, itself, maybe the problem.
Ask a family member or a friend for a PSU and check your card on it.
Then you'll know if it is the PSU or something else.