Best fan setup? 140 mm vs 120 mm?

[Blitz Blitz]

Hi. Just interesting about fans. Should I leave it on auto, or set rpm manualy? Also what fan good in front 140 mm or 120 mm? In rear I can only install 120 mm.

 

[10tacle]

Fans for a case front and back? Fans for a CPU heat sink cooler front and back? What type of fans are you referring to? If for a CPU cooler, for reference I have my dual fan 120mm/140mm Noctua cooler set up with the smaller 120mm in the front (round cowling) and larger 140mm (larger square cowling one) in the middle of it between the two heat sinks.

Regarding fan setting, if it's controlled by the motherboard software (known as PWM with a 4-pin connector), only use manual if you need it like warm summer ambient temps or notice your internal temps and component temps are getting too warm, be it case fans or CPU cooler fan(s). Otherwise just leave it on auto. In the winter I have the case fans set for low speed on my Antec Nine Hundred all the time as I like to keep my room cold for gaming, but in the summer I crank them up on high during gaming. And only during gaming as running fans at max RPM all the time causes premature death of them, let alone annoying noise.

 

[geofelt]

140mm fans more air at a given rpm than 120mm.
I would opt for 140mm front intakes where possible.
Use the 120mm rear more as a guide to direct the heated air out of the case.
Whatever comes in the front will exit somewhere, taking heat with it.

Connecting a fan to the motherboard will allow dynamic fan speed control.
I find that annoying.
I like to use fan speed reducing cables and run them at a constant speed.

With two front 140mm intakes, you will get all the cooling you need for a good air cpu cooler and a hot graphics card.

In addition, if all the front intake air is filtered, your parts will stay cleaner.

Don't screw things up by adding more fans.
They will tend to draw in unfiltered air.

 

[Blitz Blitz]

Thanks guys. Oh I forget to ask one thing. I ordered cryorig h5 universal. There is second fan option or something? Maybe it's okay with one fan? Also what 140/120 mm fans you recommend me to buy for quite and performance?

 

[geofelt]

spcr is a good source for quiet computing.
For example, here is one of their older 140mm fan articles.
http://www.silentpcreview.com/140mm_Fan_Roundup1

cryorig H5 should be plenty good with just one fan.
A second fan just adds noise for a marginal improvement in cooling.