Hi all,You guys are supposed to understand something in pneumatics and aerodynamics, so maybe you can assist me in some advise.I live in a relatively warm area and I want to cool my PC a bit with an additional 80 mm fan. I intend to attach it to the left side panel (oposite to the motherboard) after cutting out a suitable hole. The fan will be powered by an external source.Question is; should the fan blow air into the PC, or suck air out? and where should the fan be positioned - oposite the video card or in the middle of the panel?Have funSeev

Only fan after the PS fan? Then mount it high to blow hot air out. Second fan? Mount it low to blow cooler air in. Remember: "Nothing in Science su*ks."Hope this helps,JimActiveSky Support

I've got 5 fans in my stock case at the moment. getting ready to add another one.Some good tips at this link.http://www.tweak3d.net/articles/casecutting/KJhttp://fsgateway.com/frank/fs9paibeta.jpg

It's usually better to hot air blow out. Cool air will be drawn in from cooling vents by the suction anyway.I've got 5 fans (it had 6, but I removed one because it blocked part of the window) in my case, and I'm thinking of unplugging a couple to cut down on the noise. It stays nice and cool in there anyway.

Many thanks to all of you for the advise. I appriciate the time and thought you put in this issue of mine.Have funSeev

Since you plan to use external power, why not make it reversible so it can blow in when cooler outside and suck out when warmer outside?Almost ALL fans used on PC's blow INTO the case. I also live in a warm area. I have 1 computer that tended to run hot, so I added 2 fans blowing in AND 1 blowing out (thru the front vent area) to help get better internal air circulation. This is on a full tower case that has provisions for this many fans, so I did NOT need to cut any holes. ALL fans are internally powered, but the CPU fan and 1 system fan (front) are motherboard controlled. Works fine. If this is not sufficient, there are now WATERCOOLED systems available as add-ons, but I don't think much of water that close to electrical circuitry!

Hi all,Took me couple of hours to complete the upgrade. I followed Jim's advise and added 2 fans this morning, one on the left side panel near the top of the case (opposite the CPU) and the other one on the bottom of the right panel (under the HDD). Both are 180 ma, 80 mm fans. The top one is blowing out, the bottom one is blowing in.The results (in degrees celsius);Tempreture before upgrade; CPU 68, system 55.Temprature after upgrade; CPU 53, system 44.Room temprature 27.Drilling the holes with a jigsaw took minutes. power source for the fans is by a 880 ma DC power supply.Cost; power supply $7, new fan $15, obsolete fan $0.One draw back - a little additional noise, but this goes well with flying, kind of air conditioning in the cockpit.Two tips; when I opened the case I thought my PC (17 month old) was working for the USA military in "desert storm", every thing was cloged with dust, cat hair, flys, etc. you name it. No wonder the machine didn't get any air. I learned my lesson - clean the damn thing every 1/2 year or so.Second one, it is very easy to recondition a used fan. Pull the paper cover off, put a drop or two of silicon or oil in the bearing and close it with a new paper sticker.Have funSeev

I am upgrading my power supply in my Dell 8300 case and was wondering if anyone had any ideas as to how I might make that system cool a little better as well? I know their cases are fairly well engineered, but do you really think their design is "good enough" so as not to mess with it? This is also runnning a 3.0gHz P4, Radeon 9800 Pro, and Audigy 2 sound card - this thing is probably great in the winter but is just awfully hot in the summer!