Overclock.net › Forums › Cooling › Water Cooling › 800D No Way To Have Positive Airflow?
New Posts  All Forums:Forum Nav:

800D No Way To Have Positive Airflow?

post #1 of 13
Thread Starter 
Hi there I'm putting together a new build in a 800d and cant figure out a way to have positive airflow. I will have a 360 rad in the roof and the 480 rad externally with a koolance quick disconnect mount. So I will no longer have a rear exhaust fan and there for can't achieve positive airflow, does anybody have any suggestions. I have attached picture to help explain what I mean. Thanks

Full_big.jpg
Main Beast
(15 items)
 
  
CPUMotherboardGraphicsRAM
i7 3930K 4.5Ghz  Rampage IV Extreme  GTX 1080 FE 1080 SLI Almost 2Ghz Dominator Platinum 16GB 2133mhz  
Hard DriveOptical DriveCoolingOS
M4 256GBx2 Raid 0 + 4TB WD Black x2 Raid 0 LG Blu Ray Writer  Kraken X60 Windows 10 
MonitorKeyboardPowerCase
Asus ROG Swift PG278Q Logitech G810 Evga SuperNOVA 1500W NZXT Switch 810 
MouseMouse PadAudio
Logitech G900 Logitech G640 Sennheiser HD 700 
  hide details  
Reply
Main Beast
(15 items)
 
  
CPUMotherboardGraphicsRAM
i7 3930K 4.5Ghz  Rampage IV Extreme  GTX 1080 FE 1080 SLI Almost 2Ghz Dominator Platinum 16GB 2133mhz  
Hard DriveOptical DriveCoolingOS
M4 256GBx2 Raid 0 + 4TB WD Black x2 Raid 0 LG Blu Ray Writer  Kraken X60 Windows 10 
MonitorKeyboardPowerCase
Asus ROG Swift PG278Q Logitech G810 Evga SuperNOVA 1500W NZXT Switch 810 
MouseMouse PadAudio
Logitech G900 Logitech G640 Sennheiser HD 700 
  hide details  
Reply
post #2 of 13
I'm confused...

if you have all the air coming in, and none out....that is positive pressure airflow. What exactly do you mean by positive airflow?

And if you are cooling with that much rad space...what will you be cooling with air?
 
Play Server
(10 items)
 
NAS
(14 items)
 
CPUCPUMotherboardRAM
Intel Xeon L5640 Intel Xeon L5640 Dell R710 Mobo Hynix 144GB DDR3 ECC PC3L-10600R 
Hard DrivePowerCaseOther
Intel X25-M G2 80GB Redundant 840W PSU Dell 710 2.5" - Google Search Appliance Dell Perc H700 Raid Controller 
OtherOther
Dell iDRAC6 Enterprise Mellanox Connectx-2 10Gb SFP+ NIC 
CPUCPUMotherboardRAM
Intel Xeon E5-2670 v1 Intel Xeon E5-2670 v1 SuperMicro X9DRL-iF 64GB Kingston ECC (kvr16r11d4/16HA) 
Hard DriveHard DriveHard DriveCooling
12x 4TB HGST 5K4000 SanDisk SSD 960GB (cache) 6x 8TB WD Red Scythe AP-29 
CoolingOSPowerCase
2x Noctua U9DXi4 FreeNAS Corsair AX750 Norco RPC-4224 
OtherOther
3x LSI 9211-8i (HBA) Mellanox Connectx-2 10Gb NIC 
  hide details  
Reply
 
Play Server
(10 items)
 
NAS
(14 items)
 
CPUCPUMotherboardRAM
Intel Xeon L5640 Intel Xeon L5640 Dell R710 Mobo Hynix 144GB DDR3 ECC PC3L-10600R 
Hard DrivePowerCaseOther
Intel X25-M G2 80GB Redundant 840W PSU Dell 710 2.5" - Google Search Appliance Dell Perc H700 Raid Controller 
OtherOther
Dell iDRAC6 Enterprise Mellanox Connectx-2 10Gb SFP+ NIC 
CPUCPUMotherboardRAM
Intel Xeon E5-2670 v1 Intel Xeon E5-2670 v1 SuperMicro X9DRL-iF 64GB Kingston ECC (kvr16r11d4/16HA) 
Hard DriveHard DriveHard DriveCooling
12x 4TB HGST 5K4000 SanDisk SSD 960GB (cache) 6x 8TB WD Red Scythe AP-29 
CoolingOSPowerCase
2x Noctua U9DXi4 FreeNAS Corsair AX750 Norco RPC-4224 
OtherOther
3x LSI 9211-8i (HBA) Mellanox Connectx-2 10Gb NIC 
  hide details  
Reply
post #3 of 13
Thread Starter 
Quote:
Originally Posted by deafboy View Post

I'm confused...
if you have all the air coming in, and none out....that is positive pressure airflow. What exactly do you mean by positive airflow?
And if you are cooling with that much rad space...what will you be cooling with air?

I thought positive airflow is when there is more intake than exhaust fans (cfm) and in my case I have no exhaust fan at all. And nothing will be cooled by air in my build.
Main Beast
(15 items)
 
  
CPUMotherboardGraphicsRAM
i7 3930K 4.5Ghz  Rampage IV Extreme  GTX 1080 FE 1080 SLI Almost 2Ghz Dominator Platinum 16GB 2133mhz  
Hard DriveOptical DriveCoolingOS
M4 256GBx2 Raid 0 + 4TB WD Black x2 Raid 0 LG Blu Ray Writer  Kraken X60 Windows 10 
MonitorKeyboardPowerCase
Asus ROG Swift PG278Q Logitech G810 Evga SuperNOVA 1500W NZXT Switch 810 
MouseMouse PadAudio
Logitech G900 Logitech G640 Sennheiser HD 700 
  hide details  
Reply
Main Beast
(15 items)
 
  
CPUMotherboardGraphicsRAM
i7 3930K 4.5Ghz  Rampage IV Extreme  GTX 1080 FE 1080 SLI Almost 2Ghz Dominator Platinum 16GB 2133mhz  
Hard DriveOptical DriveCoolingOS
M4 256GBx2 Raid 0 + 4TB WD Black x2 Raid 0 LG Blu Ray Writer  Kraken X60 Windows 10 
MonitorKeyboardPowerCase
Asus ROG Swift PG278Q Logitech G810 Evga SuperNOVA 1500W NZXT Switch 810 
MouseMouse PadAudio
Logitech G900 Logitech G640 Sennheiser HD 700 
  hide details  
Reply
post #4 of 13
I think he means all the warm air from the rads will have no where to go causing higher case temps. I would set the top rad to blow out the case because you will be drawing enough cool air into the case that it shoulkdn't affect the rad temps.
White Knight
(0 items)
  
Reply
White Knight
(0 items)
  
Reply
post #5 of 13
Thread Starter 
Quote:
Originally Posted by Pseudonymous View Post

I think he means all the warm air from the rads will have no where to go causing higher case temps. I would set the top rad to blow out the case because you will be drawing enough cool air into the case that it shoulkdn't affect the rad temps.

Yes but I want to have positive airflow to minimize dust.
Main Beast
(15 items)
 
  
CPUMotherboardGraphicsRAM
i7 3930K 4.5Ghz  Rampage IV Extreme  GTX 1080 FE 1080 SLI Almost 2Ghz Dominator Platinum 16GB 2133mhz  
Hard DriveOptical DriveCoolingOS
M4 256GBx2 Raid 0 + 4TB WD Black x2 Raid 0 LG Blu Ray Writer  Kraken X60 Windows 10 
MonitorKeyboardPowerCase
Asus ROG Swift PG278Q Logitech G810 Evga SuperNOVA 1500W NZXT Switch 810 
MouseMouse PadAudio
Logitech G900 Logitech G640 Sennheiser HD 700 
  hide details  
Reply
Main Beast
(15 items)
 
  
CPUMotherboardGraphicsRAM
i7 3930K 4.5Ghz  Rampage IV Extreme  GTX 1080 FE 1080 SLI Almost 2Ghz Dominator Platinum 16GB 2133mhz  
Hard DriveOptical DriveCoolingOS
M4 256GBx2 Raid 0 + 4TB WD Black x2 Raid 0 LG Blu Ray Writer  Kraken X60 Windows 10 
MonitorKeyboardPowerCase
Asus ROG Swift PG278Q Logitech G810 Evga SuperNOVA 1500W NZXT Switch 810 
MouseMouse PadAudio
Logitech G900 Logitech G640 Sennheiser HD 700 
  hide details  
Reply
post #6 of 13
You are going to get get dust regardless of what type of pressure setup you have it is just a fact of life. I have a phantom now with two 200mm fans for exhaust plus the 120mm rear fan a 200mm side intake along with two 120mm side intakes and a front 140mm intake. There will be dust in my machine but i have and air compressor that use every month to clean it with. You will get more dust in the rad having it pull air into the rad than having it as exhaust. I had my h60 rad covered in dust in five weeks and was honestly shocked to see how much had built up in that small amount of time.
White Knight
(0 items)
  
Reply
White Knight
(0 items)
  
Reply
post #7 of 13
Quote:
Originally Posted by spencer785 View Post

I thought positive airflow is when there is more intake than exhaust fans (cfm) and in my case I have no exhaust fan at all. And nothing will be cooled by air in my build.

Exactly... so your case will have positive pressure meaning air will try to escape from any opening it can find. Meaning it helps keep dust from coming in there.

The inside temp of your case will be a bit warmer though, but not a huge deal since it's mostly all watercooled.

Dust will get in regardless though.

Why not turn some of the fans around?
 
Play Server
(10 items)
 
NAS
(14 items)
 
CPUCPUMotherboardRAM
Intel Xeon L5640 Intel Xeon L5640 Dell R710 Mobo Hynix 144GB DDR3 ECC PC3L-10600R 
Hard DrivePowerCaseOther
Intel X25-M G2 80GB Redundant 840W PSU Dell 710 2.5" - Google Search Appliance Dell Perc H700 Raid Controller 
OtherOther
Dell iDRAC6 Enterprise Mellanox Connectx-2 10Gb SFP+ NIC 
CPUCPUMotherboardRAM
Intel Xeon E5-2670 v1 Intel Xeon E5-2670 v1 SuperMicro X9DRL-iF 64GB Kingston ECC (kvr16r11d4/16HA) 
Hard DriveHard DriveHard DriveCooling
12x 4TB HGST 5K4000 SanDisk SSD 960GB (cache) 6x 8TB WD Red Scythe AP-29 
CoolingOSPowerCase
2x Noctua U9DXi4 FreeNAS Corsair AX750 Norco RPC-4224 
OtherOther
3x LSI 9211-8i (HBA) Mellanox Connectx-2 10Gb NIC 
  hide details  
Reply
 
Play Server
(10 items)
 
NAS
(14 items)
 
CPUCPUMotherboardRAM
Intel Xeon L5640 Intel Xeon L5640 Dell R710 Mobo Hynix 144GB DDR3 ECC PC3L-10600R 
Hard DrivePowerCaseOther
Intel X25-M G2 80GB Redundant 840W PSU Dell 710 2.5" - Google Search Appliance Dell Perc H700 Raid Controller 
OtherOther
Dell iDRAC6 Enterprise Mellanox Connectx-2 10Gb SFP+ NIC 
CPUCPUMotherboardRAM
Intel Xeon E5-2670 v1 Intel Xeon E5-2670 v1 SuperMicro X9DRL-iF 64GB Kingston ECC (kvr16r11d4/16HA) 
Hard DriveHard DriveHard DriveCooling
12x 4TB HGST 5K4000 SanDisk SSD 960GB (cache) 6x 8TB WD Red Scythe AP-29 
CoolingOSPowerCase
2x Noctua U9DXi4 FreeNAS Corsair AX750 Norco RPC-4224 
OtherOther
3x LSI 9211-8i (HBA) Mellanox Connectx-2 10Gb NIC 
  hide details  
Reply
post #8 of 13

The case does have some venting holes there in the back below the last of the PCI card slots. You can also add vented PCI slot covers for any unused slots you have. The case itself isn't exactly air tight either. So, with your current setup of rad fans and the stock bottom fan blowing in, HD fan blowing across the bottom, you will have created plenty of positive pressure that will find the vents in your case and keep the dust out. 


The only question is whether or not other MB components (NB, etc) will have enough air movement over them to keep their temps happy. Probably, but worth checking on when you first spin thing up and run it for a while.

 

I have an 800d, mix of water and air cooled, so I can at least see first hand what you are doing/thinking... 

oG's Rig
(15 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600k 4.9ghz ASUS Maxiums IV Gene-Z 5970 + 5870 CrossfireX 16gb G.Skill 1600 C8 
Hard DriveOptical DriveCoolingOS
OCZ Agility 3 120gb + 3.5tb of 'others' Sony DVD R/W Corsair h100 Win7 64bit 
MonitorPowerCaseAudio
HP 2335 + 2 HP2065 Antec EA-750 Corsair 800d Old Onkyo 5.1 THX setup 
  hide details  
Reply
oG's Rig
(15 items)
 
  
CPUMotherboardGraphicsRAM
i7-2600k 4.9ghz ASUS Maxiums IV Gene-Z 5970 + 5870 CrossfireX 16gb G.Skill 1600 C8 
Hard DriveOptical DriveCoolingOS
OCZ Agility 3 120gb + 3.5tb of 'others' Sony DVD R/W Corsair h100 Win7 64bit 
MonitorPowerCaseAudio
HP 2335 + 2 HP2065 Antec EA-750 Corsair 800d Old Onkyo 5.1 THX setup 
  hide details  
Reply
post #9 of 13
The best way IMO to have it set up is so it is like this

497
    
CPUMotherboardGraphicsRAM
AMD Ryzen R5 1600 Asus PRIME B350 PLUS  AMD Radeon HD7950 16GB Corsair Vengence (2x8GB) 
Hard DriveHard DriveHard DriveOS
1TB WD Blue 500GB WD Blue 120GB Hitachi Windows 10 Pro 
MonitorMonitorKeyboardPower
LG 32LD450 Dell Ducky DK9008 OCN Edition Corsair TX650v2 
Case
Fractal Design Core 3000 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
AMD Ryzen R5 1600 Asus PRIME B350 PLUS  AMD Radeon HD7950 16GB Corsair Vengence (2x8GB) 
Hard DriveHard DriveHard DriveOS
1TB WD Blue 500GB WD Blue 120GB Hitachi Windows 10 Pro 
MonitorMonitorKeyboardPower
LG 32LD450 Dell Ducky DK9008 OCN Edition Corsair TX650v2 
Case
Fractal Design Core 3000 
  hide details  
Reply
post #10 of 13
I have a 800D. The best way to do it is intake from the top, front, and back. Then blow that down into the PSU chamber. The PSU chamber's bottom is open, so it will leave from there. You don't always have to have a fan blowing out. The pressure from inside the case will move the air out.
 
Current PC - 550D
(27 items)
 
CPUMotherboardGraphicsRAM
Intel 3570k Asrock Z77E Gigabyte 7970 G Skill RipJaws X 
Hard DriveHard DriveCoolingCooling
Seagate Green Intel 320 SSD XSPC Raystorm Koolance 7970 Waterblock 
CoolingCoolingCoolingCooling
XSPC 1650RPM Fan Alphacool XT45 Laing DDC Bitspower 80mm Reservoir 
CoolingCoolingCoolingCooling
3/8" Copper Tubing Push-to-fit Connectors Bitspower Fittings Tygon Black Tubing 
OSMonitorMonitorKeyboard
Windows 8 Pro Viewsonic VP2770 LED Catleap Coolermaster Storm 
PowerCaseMouseOther
Seasonic 660XP2 Case Labs S3 Logitech G500 MDPC-X Sleeving 
OtherOther
Lamptron FC5 Bitspower Temperature Probes 
CPUMotherboardGraphicsGraphics
Intel 4820k Asus Rampage Gene IV MSI GTX 970 Gaming MSI GTX 970 Gaming 
RAMHard DriveHard DriveCooling
Mushkin Radioactive Intel 320 Seagate Green Laing DDC Pump 
CoolingCoolingCoolingCooling
XSPC Acrylic DDC Top 2x Alphacool XT45 240mm XSPC Fans Bitspower Silver Comp Fittings 
CoolingCoolingCoolingCooling
Tygon Black Tubing Bitspower Reservoir XSPC Raystorm EK FC-Titan Waterblock 
OSMonitorMonitorKeyboard
Windows 7 64 bit Viewsonic VP2770-LED Yamakasi Catleap  Coolermaster Storm Mechanical 
PowerCaseMouseMouse Pad
Seasonic 660W Platinum Corsair 550D Logitech G400 None 
AudioAudioAudio
Pioneer Premier Receiver Paradigm Atoms Polk Subwoofer 
  hide details  
Reply
 
Current PC - 550D
(27 items)
 
CPUMotherboardGraphicsRAM
Intel 3570k Asrock Z77E Gigabyte 7970 G Skill RipJaws X 
Hard DriveHard DriveCoolingCooling
Seagate Green Intel 320 SSD XSPC Raystorm Koolance 7970 Waterblock 
CoolingCoolingCoolingCooling
XSPC 1650RPM Fan Alphacool XT45 Laing DDC Bitspower 80mm Reservoir 
CoolingCoolingCoolingCooling
3/8" Copper Tubing Push-to-fit Connectors Bitspower Fittings Tygon Black Tubing 
OSMonitorMonitorKeyboard
Windows 8 Pro Viewsonic VP2770 LED Catleap Coolermaster Storm 
PowerCaseMouseOther
Seasonic 660XP2 Case Labs S3 Logitech G500 MDPC-X Sleeving 
OtherOther
Lamptron FC5 Bitspower Temperature Probes 
CPUMotherboardGraphicsGraphics
Intel 4820k Asus Rampage Gene IV MSI GTX 970 Gaming MSI GTX 970 Gaming 
RAMHard DriveHard DriveCooling
Mushkin Radioactive Intel 320 Seagate Green Laing DDC Pump 
CoolingCoolingCoolingCooling
XSPC Acrylic DDC Top 2x Alphacool XT45 240mm XSPC Fans Bitspower Silver Comp Fittings 
CoolingCoolingCoolingCooling
Tygon Black Tubing Bitspower Reservoir XSPC Raystorm EK FC-Titan Waterblock 
OSMonitorMonitorKeyboard
Windows 7 64 bit Viewsonic VP2770-LED Yamakasi Catleap  Coolermaster Storm Mechanical 
PowerCaseMouseMouse Pad
Seasonic 660W Platinum Corsair 550D Logitech G400 None 
AudioAudioAudio
Pioneer Premier Receiver Paradigm Atoms Polk Subwoofer 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Water Cooling
Overclock.net › Forums › Cooling › Water Cooling › 800D No Way To Have Positive Airflow?