Question about Push-Pull fan configuration

[zeroskie]

I'll try to keep this short. I'd appreciate the help from those with more watercooling experience. I have a case with limited space for radiator, essentially I can only fit on 360 rad in the front. I plan to use 6 Noctua NF-F12 fans in push-pull configuration. My GPU (Strix 3090) is for sure going to be generating more heat than my CPU (5800X). I was thinking of controlling the three pull fans with GPU temperature and the three push fans for CPU temperature. I've never set it up like this before, but I don't have a SATA Powered splitter and I didn't feel like daisy chaining 6 fans on one header.

 

My question is: Do you guys think that there is a performance penalty for not running Push-Pull fans at the same RPM? I'm thinking that the Pull fans (GPU) will be running faster and more consistently and can get help from the Push fans (CPU) only when the system is generating more heat. Is there a better way to do this like measuring the water temperature or something?

 

Thanks in advance for any insight into this question. I wish I had a background in physics or engineering or something.

[Chrisotos28]

no

[Enzo1001]

2 minutes ago, zeroskie said:

I'll try to keep this short. I'd appreciate the help from those with more watercooling experience. I have a case with limited space for radiator, essentially I can only fit on 360 rad in the front. I plan to use 6 Noctua NF-F12 fans in push-pull configuration. My GPU (Strix 3090) is for sure going to be generating more heat than my CPU (5800X). I was thinking of controlling the three pull fans with GPU temperature and the three push fans for CPU temperature. I've never set it up like this before, but I don't have a SATA Powered splitter and I didn't feel like daisy chaining 6 fans on one header.

 

My question is: Do you guys think that there is a performance penalty for not running Push-Pull fans at the same RPM? I'm thinking that the Pull fans (GPU) will be running faster and more consistently and can get help from the Push fans (CPU) only when the system is generating more heat. Is there a better way to do this like measuring the water temperature or something?

 

Thanks in advance for any insight into this question. I wish I had a background in physics or engineering or something.

I would run them of 1 header because this is just too complicated

[SavageNeo]

4 minutes ago, zeroskie said:

I was thinking of controlling the three pull fans with GPU temperature and the three push fans for CPU temperature.

Doesn ot make any sense. 360mm rad for 5800x is total overkill. and putting the aio on the front will make gpu temps worse no matter what you do. Push and pul is great for the cpu but sicne your gpu is hotter than your cpu just get a good aircooler for the cpu or get samller aio that you can mount on the top for exhaust

[zeroskie]

24 minutes ago, SavageNeo said:

Doesn ot make any sense. 360mm rad for 5800x is total overkill. and putting the aio on the front will make gpu temps worse no matter what you do. Push and pul is great for the cpu but sicne your gpu is hotter than your cpu just get a good aircooler for the cpu or get samller aio that you can mount on the top for exhaust

Do you think that 360mm rad is overkill for a 3090 + 5800X? During some benchmarks that CPU+GPU combo is drawing about 490W. I guess I could have specified that I have a GPU waterblock in the same loop as a CPU waterblock.

 

The case is just very restrictive. I can choose to either go full air or full water cooling. If I choose to use a radiator (which i've already purchased) then the rest of the case is not getting much fresh air. There's only enough room for two 80mm exhaust fans in the back. No design for fans on the top of bottom, unfortunately.

 

28 minutes ago, Enzo1001 said:

I would run them of 1 header because this is just too complicated

I have a X570 Tomahawk. I think that the CPU header provides 1A of current. Each of the NF-F12s uses 0.1A of current, so six of them should still be within reason for one header. I've just never put so many fans on one header before, wasn't sure if there was some sort of safety issue aside from the current draw.

Edited November 30, 2020 by zeroskie
Added multiquote

[Enzo1001]

4 minutes ago, zeroskie said:

Do you think that 360mm rad is overkill for a 3090 + 5800X? During some benchmarks that CPU+GPU combo is drawing about 490W. I guess I could have specified that I have a GPU waterblock in the same loop as a CPU waterblock.

 

The case is just very restrictive. I can choose to either go full air or full water cooling. If I choose to use a radiator (which i've already purchased) then the rest of the case is not getting much fresh air. There's only enough room for two 80mm exhaust fans in the back. No design for fans on the top of bottom, unfortunately.

 

I have a X570 Tomahawk. I think that the CPU header provides 1A of current. Each of the NF-F12s uses 0.1A of current, so six of them should still be within reason for one header. I've just never put so many fans on one header before, wasn't sure if there was some sort of safety issue aside from the current draw.

i meant with a splitter that has a molex or sata connector

[zeroskie]

13 minutes ago, Enzo1001 said:

i meant with a splitter that has a molex or sata connector

Ok gotcha. I'll look into that. So you would just run them all based on GPU temp?

[Enzo1001]

1 minute ago, zeroskie said:

Ok gotcha. I'll look into that. So you would just run them all based on GPU temp?

No, I would run them based on the CPU temp

[freeagent]

Whichever way you choose, push/pull will always be better than just push or pull.

[For Science!]

1 hour ago, zeroskie said:

I'll try to keep this short. I'd appreciate the help from those with more watercooling experience. I have a case with limited space for radiator, essentially I can only fit on 360 rad in the front. I plan to use 6 Noctua NF-F12 fans in push-pull configuration. My GPU (Strix 3090) is for sure going to be generating more heat than my CPU (5800X). I was thinking of controlling the three pull fans with GPU temperature and the three push fans for CPU temperature. I've never set it up like this before, but I don't have a SATA Powered splitter and I didn't feel like daisy chaining 6 fans on one header.

 

My question is: Do you guys think that there is a performance penalty for not running Push-Pull fans at the same RPM? I'm thinking that the Pull fans (GPU) will be running faster and more consistently and can get help from the Push fans (CPU) only when the system is generating more heat. Is there a better way to do this like measuring the water temperature or something?

 

Thanks in advance for any insight into this question. I wish I had a background in physics or engineering or something.

Are you talking about a custom loop? It would be better to just control all fans via fluid temperature and you do not have to concern yourself with this at all.

[zeroskie]

Just now, For Science! said:

Are you talking about a custom loop? It would be better to just control all fans via fluid temperature and you do not have to concern yourself with this at all.

I'm starting to see that answer as I do more reading online. Any recommendations for an inline temperature sensor?

[For Science!]

Just now, zeroskie said:

I'm starting to see that answer as I do more reading online. Any recommendations for an inline temperature sensor?

Assuming your motherboard has a 2-pin temperature sensor (most Asus boards have them, for example). Then I would recommend Alphacool inline sensors. 

 

https://modmymods.com/alphacool-eiszapfen-g1-4-inline-temperature-sensor-deep-black-17363.html

 

 

[zeroskie]

9 minutes ago, For Science! said:

Assuming your motherboard has a 2-pin temperature sensor (most Asus boards have them, for example). Then I would recommend Alphacool inline sensors. 

 

https://modmymods.com/alphacool-eiszapfen-g1-4-inline-temperature-sensor-deep-black-17363.html

 

 

Just reading online and looking through my MOBO  user guide, I don't think the X570 Tomahawk has a 2-pin temp sensor. Maybe I'll need to get a controller of some sort, but I don't really want to deal with a software solution. I was hoping to just set the fan curve in the BIOS.

[For Science!]

21 minutes ago, zeroskie said:

Just reading online and looking through my MOBO  user guide, I don't think the X570 Tomahawk has a 2-pin temp sensor. Maybe I'll need to get a controller of some sort, but I don't really want to deal with a software solution. I was hoping to just set the fan curve in the BIOS.

Yes, as a linux user, I totally understand that you want a self-contained system. If your board doesn't have a sensor header, it may be difficult to achieve cleanly. Something like the Aquaero would be ideal, although it is not trivial to setup. 

[zeroskie]

24 minutes ago, For Science! said:

Yes, as a linux user, I totally understand that you want a self-contained system. If your board doesn't have a sensor header, it may be difficult to achieve cleanly. Something like the Aquaero would be ideal, although it is not trivial to setup. 

Thanks for your help. I think I'll get an Aquacomputer QUADRO with the Aquaero software. Could you point me in the right direction of how I should set up the fans? Is there a math formula or table somewhere for reference?

[For Science!]

10 minutes ago, zeroskie said:

Thanks for your help. I think I'll get an Aquacomputer QUADRO with the Aquaero software. Could you point me in the right direction of how I should set up the fans? Is there a math formula or table somewhere for reference?

Unfortunately I've never setup an Aquaero myself before, but I would point you towards the Aquacomputer forums for issues specifically pertaining to the Aquaero :https://forum.aquacomputer.de/weitere-foren/board8-english-forum/

 

I know it can do a lot of stuff and setting up a fan curve tied to a temperature probe should be one of the more simple tasks,.