915F Rad Box config

[Tithonius]

Ok, so im having a small argument with people about how to configure the radiators in my loop. I will be doing a build in a 935 and i plan on using the 915F as a rad box. what i want to do is to intake air through one radiator and then exhaust it out the other one so that air goes straight through the case. people say that i wont get good performance out of that. is there a better way to configure my radiators?

 

I want to do it like this, the exhaust out the front would be passive tho because there is no fan there:

 

[thekeemo]

waht your doing there is putting that hot air right back into your system

[DevilishBooster]

I would have all fans drawing in, because then both rads are getting fresh air and the front fan will be pushing the hot air towards the back.

[Tithonius]

waht your doing there is putting that hot air right back into your system

 

so what should i do different, and how much performance would i catually lose? if its just a couple degrees then im fine. there isnt anything between the rads except tubing, so i dont need to worry about heating any componnents up

[Tithonius]

I would have all fans drawing in, because then both rads are getting fresh air and the front fan will be pushing the hot air towards the back.

 

ok so what your saying is do them all as intake, the exhaust out the back? i cant put a fan at the front tho, there isnt any mounting for it.

[Tithonius]

Edit. nvm i cant do a fan in the front, it would be passive

[thekeemo]

so what should i do different, and how much performance would i catually lose? if its just a couple degrees then im fine. there isnt anything between the rads except tubing, so i dont need to worry about heating any componnents up

all pushing in with one exhaust

[Tithonius]

all pushing in with one exhaust

 

but is one 120mm fan enough to exhaust the air of 6 rad fans? all i can do is put a single 120mm in the back of the case as an exhaust.. i feel like thats not enough for 6 intake fans

[thekeemo]

but is one 120mm fan enough to exhaust the air of 6 rad fans? all i can do is put a single 120mm in the back of the case as an exhaust.. i feel like thats not enough for 6 intake fans

yes its fine not to mention the passive in the front

[Tithonius]

so where do i do my exhaust then? there is no place to mount a fan in the 915R for an exhaust fan.. i dont know where i should place the exhaust fan

[DevilishBooster]

ok so what your saying is do them all as intake, the exhaust out the back? i cant put a fan at the front tho, there isnt any mounting for it.

There are two different styles of 915, and you should be able to mount a fan on either the front or back.

If you have the 915F then there should be a fan mount on the back, and in that situation I would have the fan on the back set to exhaust.

If you have the 915R then there should be a fan mount on the front, and in that situation I would have the fan on the front set to intake. 

 

I own a 915R (rear mounted PSU) and there is a fan in the front.

[Tithonius]

There are two different styles of 915, and you should be able to mount a fan on either the front or back.

If you have the 915F then there should be a fan mount on the back, and in that situation I would have the fan on the back set to exhaust.

If you have the 915R then there should be a fan mount on the front, and in that situation I would have the fan on the front set to intake. 

 

I own a 915R (rear mounted PSU) and there is a fan in the front.

why do the front as intake tho? then EVERY fan would be intake. wouldnt it be better to set it as exhaust to get rid of the air from the 6 intake rad fans?

[DevilishBooster]

why do the front as intake tho? then EVERY fan would be intake. wouldnt it be better to set it as exhaust to get rid of the air from the 6 intake rad fans?

I'm looking at it as a "worst case senario" (because I have two cats and live in a really dusty area). If you have the 915R with the front mounted chassis fan, putting the front fan on exhaust could potentially cause air to be drawn in through the open slots in the rear. I know, I know, you already have 6 fans drawing in through the rads causing positive pressure, but the air could possibly/eventually settle into a smooth movement where all the air from the rads is being drawn forward - which would, in turn, cause some air to be drawn in the rear. If you have air possibly being drawn in through the open, unfiltered rear, then you could be drawing in extra dust/pet hair/bbq chip crumbs. (Mmmmmmm.... BBQ....... *drool*) If you have the front fan mounted as intake, then the air entering the case has to move through the front filter and you still achieve the same effect of pushing the hot air out the open rear of the case.

[Tithonius]

I'm looking at it as a "worst case senario" (because I have two cats and live in a really dusty area). If you have the 915R with the front mounted chassis fan, putting the front fan on exhaust could potentially cause air to be drawn in through the open slots in the rear. I know, I know, you already have 6 fans drawing in through the rads causing positive pressure, but the air could possibly/eventually settle into a smooth movement where all the air from the rads is being drawn forward - which would, in turn, cause some air to be drawn in the rear. If you have air possibly being drawn in through the open, unfiltered rear, then you could be drawing in extra dust/pet hair/bbq chip crumbs. (Mmmmmmm.... BBQ....... *drool*) If you have the front fan mounted as intake, then the air entering the case has to move through the front filter and you still achieve the same effect of pushing the hot air out the open rear of the case.

 

well thats just it tho. the 935 comes with covers for the rear holes. I plan to cover then with just the plates that they provide. I know what your saying with the whole dust thing tho, and its a good point. so if i do all of the rad fans as intake then do an exhaust fan everything should be okay.. hopefully. I just dont know about the fans in the rads fighting each other, it doesent sound good that they are fighting each other by pushing air into each other.. but idk, im not the expert

[DevilishBooster]

well thats just it tho. the 935 comes with covers for the rear holes. I plan to cover then with just the plates that they provide. I know what your saying with the whole dust thing tho, and its a good point. so if i do all of the rad fans as intake then do an exhaust fan everything should be okay.. hopefully. I just dont know about the fans in the rads fighting each other, it doesent sound good that they are fighting each other by pushing air into each other.. but idk, im not the expert

If you are using the 915F (with the rear mounted case fan) and your case came with solid PCIe slot plates (mine came with plates that have large slots in them, and you're still going to have that small hole right at the thumb screws) and you're not going to have any other large openings (mobo mounted in the case), then I would set the rear fan to exhaust.

 

That way, if your case reaches perfect equilibrium, any air that enters the case NOT through the radiators will still be passively drawn in through the front panel filter mesh. I don't think you're going to have an issue though, because those 6 rad intake fans are going to create a LOT of positive pressure and you're probably going to end up with some passive exhaust from the front of the case anyway.

[W-L]

well thats just it tho. the 935 comes with covers for the rear holes. I plan to cover then with just the plates that they provide. I know what your saying with the whole dust thing tho, and its a good point. so if i do all of the rad fans as intake then do an exhaust fan everything should be okay.. hopefully. I just dont know about the fans in the rads fighting each other, it doesent sound good that they are fighting each other by pushing air into each other.. but idk, im not the expert

 

You can have it all as intake and if you place the rad box on the top of your case or completely seperate it will have an open top mesh so the heat and bleed out from the top and rear easily.

[Tithonius]

If you are using the 915F (with the rear mounted case fan) and your case came with solid PCIe slot plates (mine came with plates that have large slots in them, and you're still going to have that small hole right at the thumb screws) and you're not going to have any other large openings (mobo mounted in the case), then I would set the rear fan to exhaust.

 

That way, if your case reaches perfect equilibrium, any air that enters the case NOT through the radiators will still be passively drawn in through the front panel filter mesh. I don't think you're going to have an issue though, because those 6 rad intake fans are going to create a LOT of positive pressure and you're probably going to end up with some passive exhaust from the front of the case anyway.

 

 

You can have it all as intake and if you place the rad box on the top of your case or completely seperate it will have an open top mesh so the heat and bleed out from the top and rear easily.

 

ill be using the 915R as my rad box as its the one that comes with the 935 package. and i think ill do the front fan as exhaust, i dont like the idea of 7 fans all as intake. i would rather just use the small 92mm fan as an exhaust.. its only 92mm anyway so it can directly draw out hot air and exhaust it out the front of the case. becuase its so small and the fact that i already have 720mm of intake area i think that with 720mm intake and 92mm exhaust, everything should go well

[W-L]

ill be using the 915R as my rad box as its the one that comes with the 935 package. and i think ill do the front fan as exhaust, i dont like the idea of 7 fans all as intake. i would rather just use the small 92mm fan as an exhaust.. its only 92mm anyway so it can directly draw out hot air and exhaust it out the front of the case. becuase its so small and the fact that i already have 720mm of intake area i think that with 720mm intake and 92mm exhaust, everything should go well

 

Another option is having everything on the rads as exhaust and let the rad box passively intake air by itself from the front, rear and top if it's not used as a base for the 935 letting that be the limiting factor but it will cause more dust to enter through cracks or spaces since it's negative pressure. 

[Tithonius]

Another option is having everything on the rads as exhaust and let the rad box passively intake air by itself from the front, rear and top if it's not used as a base for the 935 letting that be the limiting factor but it will cause more dust to enter through cracks or spaces since it's negative pressure. 

 

yeah id rather keep it as positive pressure i think.

[W-L]

yeah id rather keep it as positive pressure i think.

 

I would personally let it just passively exhaust then or place a fan on the front and bottom which I believe which also has another spot for a fan.

[Tithonius]

I would personally let it just passively exhaust then or place a fan on the front and bottom which I believe which also has another spot for a fan.

 

i think what im gonna do is use the 6 rad fans as intake and the front 92mm fan as exhaust and let everything else as passive exhaust