Hi everyone there!I've already solved a very serious problem with the precious help of a person that responded to me to my post in another section of this wonderful site.I hope this happens again now... I've recently upgraded my pc hardware.I changed motherboard, graphic card and memories.Since then I cannot play a game anymore.I can do almost everything but when I try to play a game some times the pc shuts down or even in the introduction clip of the game! I searched the net and I found and downloaded 3DMark06.I run it and immediately after 30-40 seconds my pc shut down.I run 2-3 more times and once it didn't shut down but it rebooted.So a minidump file was created.I have done a clean installation (XP PRO SP3) in another partition and I run the test again.Same things happened.I run it 2 or 3 times again and once it rebooted so another minidumpfile was created.I have the most recent drivers of the gpu installed. I've already run a Prime95 (32bit) - 25.11 test as well for 8 hours and 40 min. to exclude that there is a problem with the cpu, the memories and/or the mobo.My memories are also tested with memtest and everything is ok. Is the problem the gpu for sure or could it be something else?What else can I do to be 100% sure that the gpu is the problem? My pc characteristics are: ASUS P5Q DELUXE, CPU 6300 1, 86 GHZ, 4 X 1 GB RAM CORSAIR 800 HZ, VGA GT220 ASUS 1 GB, PSU CORSAIR 850 WATT., TV CARD AVERMEDIA, 4 HARD DISCS (2X 1,5 TB SEAGATE, 1X 500 GB WD & 1X 500 GB SEAGATE, MOUSE CYBER SNYPA STINGER, KEYBOARD Microsoft Comfort Curve 2000 Greek, ROUTER THOMSON TG585).My operation system is windows xp pro sp3 and is installed in one of the 3 partitions of the WD hard disc.