Okay i need help with this PC, RollerCoaster Tycoon 3 crashes after 30 minutes of use every time. Motherboard; Gigabyte MA78GM-US2H Motherboard - AMD 780G/SB700, Socket AM2+/AM2, mATX, HDMI, DVI, VGA, Gigabit, S/PDIF, Firewire, USB 2, eSATA, RAID AMD Phenom 9550 Quad-Core Processor 2.2 Mhz 4 Core $ Logical 6GB DDR2 Ram 500GB 7200RPM Hitachi Nvidia GeForce 9500 GT Standard HP power Supply AC 100-127V ~6.0A 50/60Hz 200-240V ~3.0A Doesn't always run too slow outside game until you have more then three to four windows open, in game time after 30+ minutes it just craps out and closes program. I also had a Nvidia Geforce GT640 graphics card and ran into the same problem, then I switched to the Nvidia Geforce 9500 GT. I believe deep down the power supply may not be sufficient. To run what I have, So please can someone, anyone help me out. I want to upgrade but really can't at the moment. But would like any and all info if I can.