[SOLVED] Temperature difference between 3x 140mm exhausts and 2x 140mm exhausts + 1x 120mm exhaust?

[ProtoflareX]

Let's assume for a second, that two different PC rigs have the same case, same GPU and same CPU air cooler. However, rig #1 has two 140mm top exhaust fans and one 140mm rear exhaust fan, whereas rig #2 has the same two 140mm top exhaust fans, but one 120mm rear exhaust fan instead of a 140mm fan. I would like to know how much CPU and GPU temperatures in rig #2 would suffer due to the replacement of the 140mm rear exhaust fan with a 120mm fan.

 

[Karadjgne]

None. Seriously doubtful all 3 exhaust fans are spinning at 100% duty cycle, they'll normally be spinning a lot less, somewhat equitable to the intakes. All that's required is a decent air FLOW through the case, not any gale force windage or supposed pressure differential. This'll land case temps as somewhat equitable, even identical, so any identical cpu/gpu usage on the 2x pc's will land their coolers as being equally effective.

The only real bonus to using 140mm fans over 120mm fans is the amount of cfm per rpm. 140mm spin slower for the same performance vrs 120mm, meaning considerably quieter possible.