Case Fans

  Newuser4343 14:46 22 Jan 2006

A very simple question? Should a case fan suck in cold air or blow out hot or should there be two one doing each and if so which should be the largest?Case Quiet PC Acousticase.

  PsiFox 14:52 22 Jan 2006

Generally front fans would suck in cool air with , rear fans expelling the warmer air.

Top fan would again expel warm air and side fans generally pull air in too.

Depends on case and internals for specifics

  Totally-braindead 15:04 22 Jan 2006

It depends on how hot it gets, if you have one fan then that is usually sucking the warm air out, if you have 2 then usually the front sucks in cool air and the rear expells the warm air, this also gets an airflow going over the components, in at the front out at the back. What you don't want is two fans sucking air into the case that will just trap the warm air making it hotter. Oh running without the sides on your case sides on isn't a goog idea either, it disrupts the air flow and can actaully make things hotter.

  ade.h 17:55 22 Jan 2006

You need equalistion of pressure and carefully directed flow with no cross-currents. Example; my CPU fan is vertically mounted at 90° to the motherboard so that it is parallel to the case fan. The PSU is tucked well up out of the way to avoid disrupting the flow. Some cases now invert the PSU and position it at the bottom below the PCI cards.

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