Having the correct fans on your desktop

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I have been having problems with my desktop computer. I changed the heatsink and frm then on the computer kept shutting down, i put a thermal pad between the heatsink and the cpu and it now works but shuts down after maybe two hours. A lady in the shop i went to said that i needed two fans one to pump air into the computer and one two blow it out, is this true? With my huge new heatsink there is only room for one fan perhaps- the other one got in the way of the heat sink
 
I think it depends on the rig.As with me i have a basic rather none powerful one lol.And i`ve only got the one fan.But i think if you have a powerful/onboard graphics card and such like,it`s gonna generate more heat,so it`ll need another fan to cool it down.
 
You could do a search for 'blowhole computer mod' and find out how to make a vent at the very top of the case. I personally have three fans (two front, one side) going in and none going out (PSU is at the very bottom of the case so doesn't count). I have dust filters on the outside of all fans and the positive pressure means that no dust is sucked in through any gaps. Also consider the location of the case (near radiator or direct sunlight?).

Oh, and if you wanted, you could mount a fan on the outside (though I'm not a fan of exhaust fans, as per above), if you could be bothered to cut the wire, thread it through one of the vent holes and then solder it back together.
 
Check your computers temperature to see if it's overheating. I only have 2 case fans on my system and it doesn't over heat. It's all about the placement and your heatsinks.
 
lol personally i think shes prob trying to sell you some fans :p. But ya check the temps if they are crazy high at least aim for one where you can fit it. My family comp has no fans in the case and sits inside a small cupboard thing in our desk slightly larger than the comp itself(not my idea ^^) it gets hot in there but never has crashed because of it.
 
Wait..you put a thermal pad there? Try it with thermal compound instead and see what happens. Arctic Silver 5 is good and readily available.
 
I would recommend you have air conditioner (like ones where you press a button, turn a knob or both to set temperature or set to off) on but not to cold just cold enough to feel a good breeze or cold air and a battery powered fan this is small - small medium in size and aim the fan at the hard drive do so for about 100 minutes then turn off air conditioner.

This should help regulate temperature.

Links are provided to easily help out:

http://shop.ebay.com/?_from=R40&_tr...Battery+powered+fan&_sacat=See-All-Categories

http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias=aps&field-keywords=Battery+powered+fan
 
You should have atleast 4 fans in your system and 5 if your have a high end video card.

- 1 intake fan pulling cool air in, preferably at the bottom of the front of the case
- 1 exhaust fan blowing hot air out, preferably near the top of the back of the case
- power supply fan
- cpu fan
- video card fan

If your having problems with the cpu overheating you can try cutting a hole in the side panel of the computer case, then covering the hole with a thin filter and running a duct made of cardboard or something, from there to the cpu heatsink. This will allow the cpu fan to pull in cool air directly from outside the case. If not the cpu fan will just be blowing hot air over the cpu that is rising from the video card.
 
The more intake fans you have, the better. It also helps with dust... If more air is going in than out, it means dust won't be sucked into the case through any small openings (fan grills, ventilation holes, etc) which is better in the long run for your fans... also means less cleaning of heatsinks.
 
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