Jump to content
Search In
  • More options...
Find results that contain...
Find results in...

So Im wondering, how negatively would the cooling be affected on a PC with all fans in  a negative pressure layout. Ill have 2 360mm rads cooling a  5800x and either a 3080 or a 6800xt depending what I can get my hands on. I can obviously do the front rad fans as intakes and the tops as outtake, but that does hide the RGB of the front fans quite a bit. If I mount them also as outtake what kinda temp handicaps am I setting up for myself?

CPU Ryzen 5800x, Mobo MSI Meg ACE X570, GPU ASUS 6800 TUF, Ram Corsair Vengeance 32gb 3200 mhz, Case Fractal Designs Define R6, Cooling Custom Loop Primarily Corsair Hydro X, Corsair k95, Corsair Dark Core RGB SE, LG OLED48C1

 

Link to post
Share on other sites
Posted (edited)
46 minutes ago, Ravendarat said:

So Im wondering, how negatively would the cooling be affected on a PC with all fans in  a negative pressure layout. Ill have 2 360mm rads cooling a  5800x and either a 3080 or a 6800xt depending what I can get my hands on. I can obviously do the front rad fans as intakes and the tops as outtake, but that does hide the RGB of the front fans quite a bit. If I mount them also as outtake what kinda temp handicaps am I setting up for myself?

Heavy negative pressure is liked better than heavy positive pressure generally.  The issue is dust bunnies collect in weird places like cracks and whatnot.  I’ve heard the best possible setup is almost totally neutral with just the barest whisper of positive pressure.  Hard to arrange for though.  Negative pressure can be great if you’ve got really good control of case airflow.  I’ve heard of people doing heavy negative pressure and sealing all the cracks in their machine with electrical tape so air would only enter the way they wanted it to.  Pita to do maintenance  on of course because of all the tape.  As far as raw cooling goes ignoring dust, both heavy negative and heavy positive have the same problem.  The air may stay in the case longer than you want it to and heat up, and it may not move around very much, making for less cooling.

Edited by Bombastinator

Life is like a bowl of chocolates: there are all these little crinkly paper cups everywhere.

Link to post
Share on other sites
6 minutes ago, Bombastinator said:

Heavy negative pressure is liked better than heavy positive pressure generally.  The issue is dust bunnies collect in weird places like cracks and whatnot.  I’ve heard the best possible setup is almost totally neutral with just the barest whisper of positive pressure.  Hard to arrange for though.  Negative pressure can be great if you’ve got really good control of case airflow.  I’ve heard of people doing heavy negative pressure and sealing all the cracks in their machine with electrical tape so air would only enter the way they wanted it to.  Pita to do maintenance  on of course because of all the tape.  As far as raw cooling goes ignoring dust, both heavy negative and heavy positive have the same problem.  The air may stay in the case longer than you want it to and heat up, and it may not move around very much, making for less cooling.

Thanks, dust isnt a concern, im fine dusting weekly, maybe ill see if i can get something figured out to counteract hot spots/stale air

CPU Ryzen 5800x, Mobo MSI Meg ACE X570, GPU ASUS 6800 TUF, Ram Corsair Vengeance 32gb 3200 mhz, Case Fractal Designs Define R6, Cooling Custom Loop Primarily Corsair Hydro X, Corsair k95, Corsair Dark Core RGB SE, LG OLED48C1

 

Link to post
Share on other sites
4 minutes ago, Ravendarat said:

Thanks, dust isnt a concern, im fine dusting weekly, maybe ill see if i can get something figured out to counteract hot spots/stale air

If you’re willing to keep dust filters clear you may be best served by positive pressure. With positive pressure you get automatic control of airflow but the dust filters can fill up quickly, and depending on how fine they are you can still have buildup of fine particulate int the case.  Negative pressure makes for slower air generally so less total and smaller particulate.  The problem is you lose automatic control of airflow and dust bunnies can build up in places you can’t conveniently reach them. 

Life is like a bowl of chocolates: there are all these little crinkly paper cups everywhere.

Link to post
Share on other sites
1 hour ago, Ravendarat said:

So Im wondering, how negatively would the cooling be affected on a PC with all fans in  a negative pressure layout. Ill have 2 360mm rads cooling a  5800x and either a 3080 or a 6800xt depending what I can get my hands on. I can obviously do the front rad fans as intakes and the tops as outtake, but that does hide the RGB of the front fans quite a bit. If I mount them also as outtake what kinda temp handicaps am I setting up for myself?

Why would this affect RGB? You can put the fans on either side of the radiator, so if you want the RGB facing out he front panel, put them on the front of the rad pushing in. If you want the RGB on the inside of the case, put them on the back of the rad sucking in...

 

Don't put them all as exhaust, this will not work out well. But you can just flip the fans so they push or pull, depending on where your putting them and what you want...

Rig: i7 10700k @ 5.1Ghz, 4.8 Ring - - Z490 Vision G - - EVGA RTX 2080 XC Ultra @ 2025Mhz - - 4x8GB Vengeance Pro 3000Mhz 15-17-17-34 @ 3500MHz 16-19-19-38 - - Samsung 950 Pro 512 NVMe Boot + Main Programs - - Samsung 830 Pro 256 RAID 0 Lightroom + Photo work - - WD Blue 1 TB SSD for Games - - Corsair RM850x - - Sound BlasterX EA-5 - - EK Supremacy Evo - - XT45 X-Flow 420 + UT60 280 rads - - EK Full Cover GPU Block - - EK XRES RGB PWM - - Fractal Define S2 - - Acer Predator X34 -- Logitech G502 - - Logitech G710+ - - Logitech Z5500 - - Steel Series QcK XXL

 

Headphones/amp/dac: Schiit Lyr 3 - - Fostex TR-X00 - - Sennheiser HD 6xx

 

Homelab/ Media Server: ESXi 6.5 - - 250 GB SSD for VM's/ESXi boot - - FreeNAS - - HPE Proliant ML10 Gen 9 backbone - - i3 6100 - - 28 GB ECC - - 10x4 TB WD Red RAID Z2 - - 10TB WD Red for expendable data - - Corsair 750D - - Corsair RM650i - - Dell H310 6Gbps SAS HBA - - Intel RES2SC240 SAS Expander

 

White Lightning (original full watercooled build) - Homelab / Media Server - The Blue Beast (my car and other expensive hobby...) - iPhone Xs - 2018 MacBook Air

Link to post
Share on other sites
49 minutes ago, LIGISTX said:

Why would this affect RGB? You can put the fans on either side of the radiator, so if you want the RGB facing out he front panel, put them on the front of the rad pushing in. If you want the RGB on the inside of the case, put them on the back of the rad sucking in...

 

Don't put them all as exhaust, this will not work out well. But you can just flip the fans so they push or pull, depending on where your putting them and what you want...

The reason it matters is they are corsair LL fans so they only have the LED on one side, I want them lighting up the inside of the case so I want all fans on the inside of the rads not on the front. Realistically they are stupid lights so if its a bad idea I will just set one set as in and one as out. Its not that big of a deal, more just thinking outloud before I start. Im still waiting on tubing (6 weeks and counting corsair) and a gpu so Im not starting any time soon anyways

CPU Ryzen 5800x, Mobo MSI Meg ACE X570, GPU ASUS 6800 TUF, Ram Corsair Vengeance 32gb 3200 mhz, Case Fractal Designs Define R6, Cooling Custom Loop Primarily Corsair Hydro X, Corsair k95, Corsair Dark Core RGB SE, LG OLED48C1

 

Link to post
Share on other sites
3 minutes ago, Ravendarat said:

The reason it matters is they are corsair LL fans so they only have the LED on one side, I want them lighting up the inside of the case so I want all fans on the inside of the rads not on the front. Realistically they are stupid lights so if its a bad idea I will just set one set as in and one as out. Its not that big of a deal, more just thinking outloud before I start. Im still waiting on tubing (6 weeks and counting corsair) and a gpu so Im not starting any time soon anyways

Ah.  A love child type build.  Perhaps negative pressure and tape then.  Open loop does need a certain amount of maintainance though and you’d have to remove some of the tape to get into the case.  Hard call.  

Life is like a bowl of chocolates: there are all these little crinkly paper cups everywhere.

Link to post
Share on other sites
1 minute ago, Bombastinator said:

Ah.  A love child type build.  Perhaps negative pressure and tape then.  Open loop does need a certain amount of maintainance though and you’d have to remove some of the tape to get into the case.  Hard call.  

Lol ya, like its not a big deal, also not my first open loop system, might actually have another idea but ill have to play around with some things to figure out if it will work, stay tuned

CPU Ryzen 5800x, Mobo MSI Meg ACE X570, GPU ASUS 6800 TUF, Ram Corsair Vengeance 32gb 3200 mhz, Case Fractal Designs Define R6, Cooling Custom Loop Primarily Corsair Hydro X, Corsair k95, Corsair Dark Core RGB SE, LG OLED48C1

 

Link to post
Share on other sites
5 hours ago, Ravendarat said:

Lol ya, like its not a big deal, also not my first open loop system, might actually have another idea but ill have to play around with some things to figure out if it will work, stay tuned

In my system negative pressure outperforms positive/balanced pressure by almost 10 degrees fluid temperature. With watercooling one of the advantages is to directly exhaust the hot air through the radiators out of the case, if you are sending that air in, you have more work for the case fans to do.

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×