Overclock.net › Forums › Cooling › Water Cooling › A couple of questions.
New Posts  All Forums:Forum Nav:

A couple of questions.

post #1 of 5
Thread Starter 
Hi,

I'm looking at getting a new computer and with it I'll be attempting my first water-cool build. I want to water cool a CPU and two graphics cards.

I have a couple of questions that I was hoping you could answer for me.

When choosing a radiator how do i decided if I want something the cools better with low fan speeds or high fan speeds?
-Is it just the noise, or will high fan speed radiator cool better than lower fan speed radiators?

When choosing a reservoir what ml should I be looking at for CPU and two graphics cards, is more better?

Fan direction, does it matter (pull or push?)

How do I choose a pump?

Thanks very much.
Prodigious
(23 items)
 
  
CPUMotherboardGraphicsRAM
3930K Asus Rampage IV Extreme MSI GTX 780 SLI x 2 Corsair Platinum 
Hard DriveCoolingCoolingCooling
Samsung Pro 840 alphacool Monsta 480mm alphacool Monsta 480mm DT Waterblock Sniper 3 Noz 
CoolingCoolingCoolingCooling
Ek 250ml Reservoir XSPC GTX Titan Waterblock XSPC GTX Titan BackPlate Alphacool VP655 Pump 
OSMonitorMonitorKeyboard
Windows 8 Asus PB278Q Panasonic Full HD LED TV 32" Leopold 500R Cherry Red 
PowerCaseMouseMouse Pad
Silverstone Strider Gold 850W Caselabs STH10 logitech g600 Razer 
AudioAudioAudio
Shiit Magni Shiit Modi Beyerdynamic DT880 600ohm 
  hide details  
Reply
Prodigious
(23 items)
 
  
CPUMotherboardGraphicsRAM
3930K Asus Rampage IV Extreme MSI GTX 780 SLI x 2 Corsair Platinum 
Hard DriveCoolingCoolingCooling
Samsung Pro 840 alphacool Monsta 480mm alphacool Monsta 480mm DT Waterblock Sniper 3 Noz 
CoolingCoolingCoolingCooling
Ek 250ml Reservoir XSPC GTX Titan Waterblock XSPC GTX Titan BackPlate Alphacool VP655 Pump 
OSMonitorMonitorKeyboard
Windows 8 Asus PB278Q Panasonic Full HD LED TV 32" Leopold 500R Cherry Red 
PowerCaseMouseMouse Pad
Silverstone Strider Gold 850W Caselabs STH10 logitech g600 Razer 
AudioAudioAudio
Shiit Magni Shiit Modi Beyerdynamic DT880 600ohm 
  hide details  
Reply
post #2 of 5
Welcome to OCN
Seravee
(27 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming EVGA GTX 1080 FTW2 Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD60EZRX  WD Red WD80EFZX 8TB  Seagate Ironwolf Pro 10 TB 
Optical DriveCoolingCoolingOS
LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S Windows 7 64 Bit 
MonitorMonitorKeyboardPower
Asus PG279Q LG 49UH750V 4K LED TV Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone EMP Roccat Sense Metor Sennheiser HD 598 
AudioAudioAudioAudio
Onkyo TX NR646  Harman Kardon HKTS 60 Dali Opticon Vokal x2 Dali Opticon 2 
AudioOtherOther
x2 Dali Opticon 1 CableMod E series PSU cable set CableMod LED Strips 
  hide details  
Reply
Seravee
(27 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core I7 6850K Gigabyte X99 Ultra Gaming EVGA GTX 1080 FTW2 Kingston HyperX DDR4 Savage 3000 MHz 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Evo WD Green WD60EZRX  WD Red WD80EFZX 8TB  Seagate Ironwolf Pro 10 TB 
Optical DriveCoolingCoolingOS
LG CH12NS30 x5 Noctua NF-A14 FLX Noctua NH-D15S Windows 7 64 Bit 
MonitorMonitorKeyboardPower
Asus PG279Q LG 49UH750V 4K LED TV Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
CaseMouseMouse PadAudio
Phanteks Enthoo Luxe Roccat Kone EMP Roccat Sense Metor Sennheiser HD 598 
AudioAudioAudioAudio
Onkyo TX NR646  Harman Kardon HKTS 60 Dali Opticon Vokal x2 Dali Opticon 2 
AudioOtherOther
x2 Dali Opticon 1 CableMod E series PSU cable set CableMod LED Strips 
  hide details  
Reply
post #3 of 5
Rad:
Here's a link for some info on rads, also check out the individual reviews. My goal was silence so I chose low FPI and undervolt my fans.
http://martinsliquidlab.org/2012/04/14/360-radiator-shootout-summary/

Res:
Choose whatever seems to have a good build quality and looks nice.

Fan Direction:
Push+Pull > Push > Pull
http://martinsliquidlab.org/2012/01/15/radiator-shroud-testing-v2/

Pump:
Each component in your loop will add resistance (aka pressure drop). The pump provides X gpm (flow) at Y pressure. As your resistance increases, the less flow the pump makes. You will want to be above 1gpm, but increasing it higher isn't necessary. After you have chosen all of your components make an estimate of the total resistance and then choose a pump that can maintain higher than 1 gpm. How loud the pump gets is also a concern. In my machine it is the loudest component next to the HDD (which I turn off when not in use). Choosing a pump with PWM or a speed dial can give you some wiggle room to find a good combo of flow vs noise.
http://martinsliquidlab.org/pump-planning-guide/
post #4 of 5
Quote:
Originally Posted by Vakturion View Post

Hi,

I'm looking at getting a new computer and with it I'll be attempting my first water-cool build. I want to water cool a CPU and two graphics cards.

I have a couple of questions that I was hoping you could answer for me.

When choosing a radiator how do i decided if I want something the cools better with low fan speeds or high fan speeds?
-Is it just the noise, or will high fan speed radiator cool better than lower fan speed radiators?

When choosing a reservoir what ml should I be looking at for CPU and two graphics cards, is more better?

Fan direction, does it matter (pull or push?)

How do I choose a pump?

Thanks very much.

If you haven't checked out martin's liquid lab you should do that right now. It's hands down the best side-by-side testing and comparison site for all watercooling components. Most of your technical questions will be answered there.

The following are my own off-the-cuff answers, subject to revision should anything at Martin's (or anyone else commenting here) contradict them:

For rads it basically comes down to fin density and thickness. Thicker and denser means it needs a stronger/faster fan to maximize the rad's potential. All things being equal, more air flow from a stronger/faster fan will mean your rad is getting cooled faster. That also means the fan will be louder. So you have to decide for yourself what level of fan noise or silence will make you happy, and choose your components appropriately. Now note that I said maximize regarding a rad's performance... nothing will stop you from running any kind of rad with any kind of fan, at any speed you desire. Martin's has some great articles on this pairing different fans with different rads.

Now all that being said, IMO if you're not looking to push a huge overclock and need to squeeze every last drop of cooling out of your rig, the difference in practical performance isn't going to be earth-shattering between a dense rad with a high static pressure fan and a slim rad with a slower fan. But it will be measurable. Related to all this, a lot of people like to use fan controllers so you can turn the rad fans down to a comfortable noise level for normal use, and dial them up when your hardware is cranking.

BTW the rule of thumb for rad capacity if you haven't run across it yet, is one 120x120 per CPU and GPU, plus one 120x120 as overhead. So for what you described that would be 4x120.

Reservoirs are really about whether you prefer bay res's or the interior tubular style. The total volume of water in your loop will affect how quickly your loop will reach the thermal equilibrium point (heat added by chips = heat dissipated by rads [and elsewhere] resulting in stable coolant temp). More water means the loop will heat up and cool down more gradually. IMO, as with pretty much everything in watercooling, more is always better and it comes down to questions of practicality and taste (meaning what can you attractively fit inside your rig) vs. economics (how much ramen you're willing to eat in order to pay for it).

Fan direction: once again, Martin's has some truly excellent articles detailing the difference. All else being equal, push+pull > push > pull. It's also usually better to exhaust the air coming through a rad out of your case instead of in, and let cool air flow in from the bottom of your case and hot air exhaust out the top. Those are general guidelines only as specific setups and configurations can potentially perform better by breaking one or both of those rules.

Pump choice will somewhat be determined if you go for a bay res/pump combo, but other than that I can't really speak to what to avoid. FWIW I'm somewhat suspicious of the smaller built-in versions. I use a D5 in my loop (on a monsoon bay res) and it's always done the job. Can you guess what's coming next? wink.gif Check out martin's, he's got plenty of pump data to look through.
Blinky
(16 items)
 
  
CPUMotherboardGraphicsRAM
i7-950 @4.034 GHz Asus Rampage III Formula GeForce GTX 770 6GB Crucial Ballistix 1600MHz 
Hard DriveCoolingCoolingOS
Samsung 840 Pro SSD EK Supreme HF (full nickel) Danger Den Monsoon Dual-Bay Reservoir/Pump Win 7 Pro 64 
MonitorKeyboardPowerCase
Dell U2410 Rosewill RK-9000 Seasonic X-650 Cosmos 1000 
Other
Lamptron FC5-V2 
  hide details  
Reply
Blinky
(16 items)
 
  
CPUMotherboardGraphicsRAM
i7-950 @4.034 GHz Asus Rampage III Formula GeForce GTX 770 6GB Crucial Ballistix 1600MHz 
Hard DriveCoolingCoolingOS
Samsung 840 Pro SSD EK Supreme HF (full nickel) Danger Den Monsoon Dual-Bay Reservoir/Pump Win 7 Pro 64 
MonitorKeyboardPowerCase
Dell U2410 Rosewill RK-9000 Seasonic X-650 Cosmos 1000 
Other
Lamptron FC5-V2 
  hide details  
Reply
post #5 of 5
Thread Starter 
Thank you very much gzboli and Threephi for all the answers and information given, this will help me alot. Thanks for the link to Martins, I've not seen it before.
Prodigious
(23 items)
 
  
CPUMotherboardGraphicsRAM
3930K Asus Rampage IV Extreme MSI GTX 780 SLI x 2 Corsair Platinum 
Hard DriveCoolingCoolingCooling
Samsung Pro 840 alphacool Monsta 480mm alphacool Monsta 480mm DT Waterblock Sniper 3 Noz 
CoolingCoolingCoolingCooling
Ek 250ml Reservoir XSPC GTX Titan Waterblock XSPC GTX Titan BackPlate Alphacool VP655 Pump 
OSMonitorMonitorKeyboard
Windows 8 Asus PB278Q Panasonic Full HD LED TV 32" Leopold 500R Cherry Red 
PowerCaseMouseMouse Pad
Silverstone Strider Gold 850W Caselabs STH10 logitech g600 Razer 
AudioAudioAudio
Shiit Magni Shiit Modi Beyerdynamic DT880 600ohm 
  hide details  
Reply
Prodigious
(23 items)
 
  
CPUMotherboardGraphicsRAM
3930K Asus Rampage IV Extreme MSI GTX 780 SLI x 2 Corsair Platinum 
Hard DriveCoolingCoolingCooling
Samsung Pro 840 alphacool Monsta 480mm alphacool Monsta 480mm DT Waterblock Sniper 3 Noz 
CoolingCoolingCoolingCooling
Ek 250ml Reservoir XSPC GTX Titan Waterblock XSPC GTX Titan BackPlate Alphacool VP655 Pump 
OSMonitorMonitorKeyboard
Windows 8 Asus PB278Q Panasonic Full HD LED TV 32" Leopold 500R Cherry Red 
PowerCaseMouseMouse Pad
Silverstone Strider Gold 850W Caselabs STH10 logitech g600 Razer 
AudioAudioAudio
Shiit Magni Shiit Modi Beyerdynamic DT880 600ohm 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Water Cooling
Overclock.net › Forums › Cooling › Water Cooling › A couple of questions.