Intakes making hardware run hotter?

[smerchk0craft]

I have an antec 300 case with an hd7770 and an i3 2120 on a gigabyte mobo.
I recently fixed my cable management and put in 3 rosewill 120mm red LED case fans (one on side pannel, 2 in front where HDD bays are, all intake) and i have 1 120mm antec 3 speed and 1 140mm antec 3 speed. Once i hooded up my intakes and put all my fans on the fan controller my gpu and cpu idol has gone up 3 degress and load about 4/5 degress (Celsius). Configuration is 3 in 2 out

WHy would it be making my pc hotter?

 

[videogames101]

positive pressure doesn't lead to better temperatures, it controls dust when using filters

 

[Jabrono]

Adding intake fans are great at getting extra air in the case but what happens once you've got that air in the case? How does it get back out? If you don't have enough exhaust fans to match you intake fans that air is just going move around your case picking up heat as it goes and making your components hotter.

More fans doesn't necessarily mean better cooling.

 

[Cerb]

For quietness or dust, I like to use just front or bottom intakes. Doing that also makes it not matter what other holes there are throughout the case. For lower temps, a fairly balanced pushed/pull, front to back (or back to front, but that's anti-ATX talk ), is better.

By having fans fans fans you increase the likelihood that one of the intakes will reuse warm exhausted air, before it sufficiently disperses (IE, front fan->inside->rear fan->outside->side fan->back inside).

You would probably be better off to have just two intakes in the front, 1 exhaust fan in the rear (your video card and PSU will also exhaust some, and you can use the multiple speeds to help balance things out a bit), and to cover the side fan hole and whichever rear hole isn't put to use, or use both rear exhausts with slower fans than the front intakes, and covering the side hole. The side intake, up high, is pretty useless (a lower-set one might be good with multiple video cards, FI).

 

[Meghan54]

Adding intake fans are great at getting extra air in the case but what happens once you've got that air in the case? How does it get back out? If you don't have enough exhaust fans to match you intake fans that air is just going move around your case picking up heat as it goes and making your components hotter.

More fans doesn't necessarily mean better cooling.

Hello. What air tight cases do you use? The ones I've used over the years are anything but air tight, and in many cases designed as such, such as ventilated slot covers on the rear of the case and venting/perforating the panel above the I/O panel.

Besides, even if those didn't exist, air will either enter or escape through every crack and crevice on the case, like where the side panels sit, around your optical drive, around the front bay covers, etc.

The fact remains you'll exhaust exactly the amount of air you manage to put into the case. The increase in atmospheric pressure in a case set up as positive pressure will be negligible at best.

 

[Vectronic]

You'll exhaust the same amount that gets pulled in... but, what air is being exhausted?

It's fairly easy to setup an air-flow where the cool air coming in, is also the air being exhausted, and all the hot components, are just sitting in a stagnant cloud of their own radiation.

Think of a hotel hallway, where one end of the hallway is an intake, the other end is an exhaust... you leave all the doors to the rooms open, the hallway will cool down very quickly, the rooms won't because they are only cooling by their own convenction (sucking in as much cool air as they are expanding/pushing out)... almost staying the same temperature.

As apposed to one end of the hallway being an intake, the other end closed off, and a window open in each room... then they all benefit from the cool air being sucked in directly.