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Water Cooling Help

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  • Water Cooling
  • CPUs
Last response: in CPUs
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August 6, 2014 7:20:27 AM

Hi guys I have just changed to a FX 8320 and Asus M5 a97 r2.0 motherboard but my CPU temps are too high on Idle i am getting around 50-59c and when i stress test with OCCU its starts and just crashes when it goes up to 68c very quickly I have tried cleaning the thermal paste off and re-applying but still same with stock cooler so i have bought this Cooler Master Seidon 120V CPU Liquid Cooler Kit for delivery tomorrow would this lower the temps guys or is there something else i should be doing

set up is
FX-8320
Asus M5 A97 R2.0
16gb Vengenge 1600mhz ram
120gb SSD
1tb HDD
Radeon HD 7870
Gaming Case with 6 fans all running
xfx core 850w 80+ PSU

thanks guys

More about : water cooling

a b à CPUs
August 6, 2014 7:40:39 AM

AMD stock coolers are pretty terrible and a 120V will do a better job.

Remember that AIOs are still cooled by air; the air passes over the radiator and the water is then pumped to the processor.

A lot of people will recommend mounting the fans so they take air from inside the case, but this isn't the best method. The warm air in the case will pass over the radiator which will warm the water.

It's better to mount the fans so they take air in from outside the case, as ambient air is cooler. Obviously, make sure you maintain good air flow, so switch some other fans around to compensate if you have to.
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August 6, 2014 7:43:27 AM

thanks pal
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a c 252 à CPUs
August 6, 2014 8:37:45 AM

1. There is no 120mm/140mm CLC that can match the performance of any of the better air coolers (Phanteks PH-TC14-PE, Noctua DH-14 and 15) and the ones that get close, make it sound like you live next to an airport. The air coolers start at about $65

2. A 240/280 CLC will match the better air coolers at similar fan speeds (I.e. Corsair H110) and noise levels....These are about $110

3. An OLC (Open Loop Cooler) not only will crush the above but be extremely quiet while doing so. The Swiftech 220-X does this in a quiet and very aesthetically pleasing package but ya looking at about $130. OTOH, you can expand the loop to water cool your MoBo, GPUs RAM whatever.

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a b à CPUs
August 6, 2014 8:43:50 AM

Like stated above, mount the rad/fan in the exhaust position right by the motherboard inputs or through the roof with the fans pushing air through the radiator and out of the case. Heat rises, just remember that. Good Luck it will do much better than the stock cooler. However, the fan is fairly loud but you can always upgrade that to quieter ones.
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a c 252 à CPUs
August 6, 2014 12:55:10 PM

ohyouknow said:
Like stated above, mount the rad/fan in the exhaust position right by the motherboard inputs or through the roof with the fans pushing air through the radiator and out of the case. Heat rises, just remember that. Good Luck it will do much better than the stock cooler. However, the fan is fairly loud but you can always upgrade that to quieter ones.


That is the opposite of what was stated above.

bicycle_repair_man said:
A lot of people will recommend mounting the fans so they take air from inside the case, but this isn't the best method. The warm air in the case will pass over the radiator which will warm the water.

It's better to mount the fans so they take air in from outside the case, as ambient air is cooler. Obviously, make sure you maintain good air flow, so switch some other fans around to compensate if you have to.


Heat rises when there's no fans but the laws of themodynamic heat transfer have a much greater effect that always trumps air convection

q = k A dT / s

where

q = heat transfer (W, J/s, Btu/s)
A = heat transfer area (m2, ft2)
k = thermal conductivity of the material (W/m.K or W/m oC, Btu/(hr oF ft2/ft))
dT = temperature difference across the material (K or oC, oF)
s = material thickness (m, ft)

Whether you have the fans blowing into our out of ya case, everything not bolded above is a constant we will call C

So the formula becomes q = C * dT

Now to the question

Ambient Air = 25C
Inside Case Air = 30C
Coolant Temperature = 35C

Delta T with air blowing out of the case = 5
Delta T with air blowing into the case = 10

Exhaust Scenario Heat Removed (q) = C * 5
Intake Scenario Heat Removed (q) = C * 10

Blowing cooler 25C air thru the radiator into the case will remove twice as much heat from the coolant as blowing 30C air thru the radiator out of the case.

Pop over to OCN and look at all of the crazy folks with 2, 3 and 4 radiators .... some have 32 fans ...16 on both sides of the rads, all blowing air into the case.

My build:

Top Rad = XT45-420 w/ 6 x 140mm fans in push / pull blowing air into the case
Bottom Rad = XT60-280 w/ 4 x 140mm fans in push / pull blowing air into the case
Case Fans = (2) Front Case Fans Blowing In / (2) Side Case Fans Blowing In / (1) Rear Case Fans Blowing In

I would have had the side fans blowing out if the mounts were at the rear of the case but as they are at the front of the case, the air would just short circuit from the front fans.
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August 7, 2014 5:52:39 AM

I have 4 fans blowing air out of the case and 4 blowing in now but the stockCPU cooler is usuless the case i use has the pipe hole already so should be easy to get set up i think but thanks for the help guys
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