2 fan configuration.

[Lemonpearl]

I have two fans. Which is best? 2 exhaust fans near cpu or 1 exhaust near cpu and one intake at front of case.

[K0NA]

Air flow, one intake, one exhaust i prefer, but everthing also depends of room tempratures and thinks like that. 

But i suggest one intake, one exhaust! 

[ThinkWithPortals]

6 minutes ago, Lemonpearl said:

I have two fans. Which is best? 2 exhaust fans near cpu or 1 exhaust near cpu and one intake at front of case.

One intake, one exhaust would be optimal there.

[manikyath]

is there a reason you cant put both fans intake?

[K0NA]

Just now, manikyath said:

is there a reason you cant put both fans intake?

You can put both fans intake, but you need to get the warm air out of the case also, to decrease and temps inside 

[Lemonpearl]

Just now, manikyath said:

is there a reason you cant put both fans intake?

Can do if that's better than one intake + one exhaust.

[manikyath]

Just now, K0NA said:

You can put both fans intake, but you need to get the warm air out of the case also, to decrease and temps inside 

misconception.

 

as long as the intake provides enough inflow of air (as in, when your fanfilters arent stuffed) having an exhaust fan doesnt make much difference. when air is pushed in, hot air is automatically displaced and pushed outwards passively.

[ThinkWithPortals]

1 minute ago, manikyath said:

misconception.

 

as long as the intake provides enough inflow of air (as in, when your fanfilters arent stuffed) having an exhaust fan doesnt make much difference. when air is pushed in, hot air is automatically displaced and pushed outwards passively.

Really? When I was looking at thermal benchmarks of my case (EVOLV ITX) adding a 140mm exhaust fan to assist the stock 200mm intake improved temps considerably.

[manikyath]

1 minute ago, Lemonpearl said:

Can do if that's better than one intake + one exhaust.

well.. try it, moving fans around is quite simple.

 

i've noticed a big decrease in dust inside the case having two fans on a filtered intake compared to one filtered intake and one exhaust. and having some extra influx of fresh air certainly didnt do any bad with a big GPU

[K0NA]

Just now, manikyath said:

misconception.

 

as long as the intake provides enough inflow of air (as in, when your fanfilters arent stuffed) having an exhaust fan doesnt make much difference. when air is pushed in, hot air is automatically displaced and pushed outwards passively.

Nope i would not say is a misconception, but yeah you have right also. 

As long fanfilters is not stuffed, in my own experience i have lower temps with 3 front air intake fans, and 4 exhaust fans, 3 on the top of my case, and one behind the case.

And when i tried different i have higher temps, but its not critical. So yes both is right, but "I" prefer both intake and exhaust. 

[manikyath]

1 minute ago, ThinkWithPortals said:

Really? When I was looking at thermal benchmarks of my case (EVOLV ITX) adding a 140mm exhaust fan to assist the stock 200mm intake improved temps considerably.

you're talking adding.

 

you should compare between the stock 200mm and the 140mm exhaust, or the stock 200mm and the 140mm as extra intake.

[SpaceGhostC2C]

14 minutes ago, manikyath said:

misconception.

 

as long as the intake provides enough inflow of air (as in, when your fanfilters arent stuffed) having an exhaust fan doesnt make much difference. when air is pushed in, hot air is automatically displaced and pushed outwards passively.

Doesn't make much of a difference in what? Having an exhaust fan near the motherboards I/O panel will help the passively cooled mobo components staying cool by removing warm air from their surroundings faster than with just intake fans. CPU temps may not show that much of a difference due to having it's own fan to move air through it's heatsink. Normal fans don't create much of a "flow" a few inches away from them, although warm air will of course be gradually displaced.

 

34 minutes ago, Lemonpearl said:

I have two fans. Which is best? 2 exhaust fans near cpu or 1 exhaust near cpu and one intake at front of case.

If your only concern is GPU and CPU temps (or even just one of those), you can find this useful:

 

[manikyath]

1 minute ago, SpaceGhostC2C said:

Doesn't make much of a difference in what? Having an exhaust fan near the motherboards I/O panel will help the passively cooled mobo components staying cool by removing warm air from their surroundings faster than with just intake fans. CPU temps may not show that much of a difference due to having it's own fan to move air through it's heatsink. Normal fans don't create much of a "flow" a few inches away from them, although warm air will of course be gradually displaced.

i've had bad experiences with mobo VRM temps in pretty much any scenario but actively cooling them

 

and the fans basicly "pull" air into the case, which since your case isnt a pressure vessel means air is leaving somewhere else.

 

i actually had a dual-intake setup for quite a long time, but the biggest weak point is that once that your fan filters clog up (and if you forget to clean it) you basicly fall back to no airflow at all. 

[SpaceGhostC2C]

7 minutes ago, manikyath said:

 

and the fans basicly "pull" air into the case, which since your case isnt a pressure vessel means air is leaving somewhere else.

 

Yes, and it wouldn't matter if the case was sealed except for the fan mounts. But since cases have openings of all sorts here and there, running all intakes will cause air to leave slowly through all remaining openings, while having 1 intake and 1 exhaust will increase the amount of air leaving through the exhaust mount. I guessed a cranked up delta fan as intake could make more air leave in a particular direction, but normally intake fans won't be enough to direct air, hence why 1+1 generates more of a "flow".

Similarly, an all-exhaust setup will pull air slowly in from all openings, which other than a dust nightmare, is only bad for HDD cages or GPU (depending on fan location and GPU cooler style, I guess).

 

So yeah, air is air  Keeping the total amount of fans constant, the only thing that different setups do is to change local flow rates in the vicinity of the fan.

[WoodenMarker]

2 hours ago, manikyath said:

i've noticed a big decrease in dust inside the case having two fans on a filtered intake compared to one filtered intake and one exhaust. and having some extra influx of fresh air certainly didnt do any bad with a big GPU

Which is better depends on the layout of the system. Some cases are better for venting out the case with openings so going with all intakes is viable whereas others highly benefit from an active exhaust near the heat source.

 

[manikyath]

1 minute ago, WoodenMarker said:

Which is better depends on the layout of the system. Some cases are better for venting out the case with openings so going with all intakes is viable whereas others highly benefit from an active exhaust near the heat source.

 

i went to check to make sure to recommend a suggestion "fit to size" (bringing it up would be useless if OP couldnt even have two front intakes) and from some googling around OP's "Corsair Carbide Series 88R Windowed" isnt very different in terms of airflow from my define R5.

[LogicalDrm]

Personally I would prefer having single exhaust over two intakes. But if you have bigger case or top mounted PSU, place two as intakes and use PSU as exhaust.