Question Are three 800RPM 120mm fans in front of the case enough to cool my parts?

[moldy.toad.on.the.road]

I am getting a Cooler Master MB511 with three 120mm fan slots which I intend to fill with three Scythe Kaze Flex 120mm 800RPM (SU1225FD12L-RD) with 43.03CFM airflow.
Will this be enough air intake to cool my Ryzen 7 2700x on a Scythe Mugen 5 (light to medium overclock) and my GTX 1660 at heavy loads? Or must I really get higher RPM fans?
I'll have the stock fan in the back and probably add one to the top of the case.

 

[Darkbreeze]

I wouldn't recommend going with less than a 1200rpm fan for any case fan location unless it was a 200mm fan. For 120 and 140mm fans, you really want to see something between 1200-1500 for most standard systems. Just because it CAN go that fast doesn't mean it WILL go that fast. If it doesn't need to, it won't, so long as you have them configured properly by connecting them to an appropriate fan header and configure the fan curve to your liking in the BIOS.

 

[thegnomeofold]

Yeah it'll be fine, although i recommend going with higher rpm fans for those extra degrees off

 

[Darkbreeze]

Really it has very little to do with "extra degrees off" and everything to do with not exceeding maximum temperatures under full load situations. At only 800RPMs maximum, if you are under a very heavy load and the system cannot increase the intake airflow, you might starve your CPU cooler and lack sufficient airflow over the VRMs. Having extra degrees off doesn't matter if you are already within thermal specifications but it MIGHT matter if you get into a situation where you are edging past the point of acceptable maximum thermal compliance.

In other words, bringing temps down to 75°C if you are at 80°C, makes very little difference because you are already compliant and there is really not much to be gained by dropping five degrees.

If however you are at 85°C, then bringing the airflow up to allow the cooler itself to work a bit better might actually bring you back down into the compliant range.

Saying it will be fine without even knowing anything of importance about the equation such as what the local ambient temperature is in the room where this computer resides or to what degree "light to medium" overclocking implies in their opinion, is kind of premature.