I would not just leave the case open. Get a fan and am it at in inside the case. A P-IV 2.8Ghz would shut down cause the fan stopped working. (Detected too much heat). The open case and the fan kept it working till Gateway sent a replacement. Eric _____ From: computertalkshop-bounce@xxxxxxxxxxxxx [mailto:computertalkshop-bounce@xxxxxxxxxxxxx] On Behalf Of CRAZYDOVE@xxxxxxx Sent: Tuesday, December 20, 2005 5:49 PM To: computertalkshop@xxxxxxxxxxxxx Subject: [CTS] 1 more question.. I also have a failing power supply (the fan), I blew it out with canned air..but the fan in the power supply was grinding a bit..right now it sounds fine..BUT..my next question is..if the fan goes..in the power supply, (keep in mind I have the side of my pc open for cooling), will the power supply stop working??? Should I shut my pc down till I put in a new one? AND..I have a 350 watt in it now..can I bump it up a bit..or is that pushing it..does it depend on the MB? Whew..ok..done...... Thanks a bunch..Jackie