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high water cooling temps

rhc1690

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#1
hello im new to the forums. i have an fx8350 and a gigabyte hd 7970 under water using the xspc 240 kit and a 120mm x 45mm thick single rad. i had problems getting an air lock out but thankfully that has now disappeared however i am experiencing quite high temps under load.

with the cpu left at stock i hit 59c and if left to stress for more than 20 mins hits 67c before i stop the stress. likewise in gaming the 7970 at stock settings reaches 71c after about 20 mins gaming which is 8c higher than the stock cooler that was originally on the card.

both the cpu and gpu have been reseated numerous times so i know its not a poor fitting. im beginning to wonder if the xspc all in one pump/res is not powerful enough to cool the 2 components however numerous google searches say this is not the case.

one thing i did notice as you can see in the pic below is what appears to be scorch marks on the base of the cpu block which i have never seen before


i have tried routing the tubing various ways in the loop over the weekend but still no joy

does anyone have any ideas or suggestions as to what to try next
 

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#2
What is the order for the water from reservoir back to reservoir?
 

rhc1690

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#3
pump/res>240mm rad>7970>120mmrad>cpu>res. i have tried various ways of routing tubing but no joy with temps at all especially when various searches report people with similair setups rarely going above 40c on the gpu
 

RCoon

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#4
I thought most people usually put the res after the component it's supposed to cool, for example:
pump/res>CPU>120mm rad>gpu>240mm rad>pump/res
Which xspc pump/rad combo do you have? is it the dual 5.25 bay one or the single?
Make sure to check the CPU and GPU block inside to make sure there's no gunk or contamination making the fluid too heavy or clogging up any fitting.
I have never used a pump/res combo, so i cant tell you if the pump is powerful enough or not.
I'll have to do a little research.
 

rhc1690

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#5
I thought most people usually put the res after the component it's supposed to cool, for example:
pump/res>GPU>240mm rad>cpu>120mm rad>pump/res
Which xspc pump/rad combo do you have? is it the dual 5.25 bay one or the single?
Make sure to check the CPU and GPU block inside to make sure there's no gunk or contamination making the fluid too heavy or clogging up any fitting.
I have never used a pump/res combo, so i cant tell you if the pump is powerful enough or not.
I'll have to do a little research.
the system is only 3 weeks old and been flushed out numerous times, its the 5.35 dual bay pump/res xspc 240mm starter kit.

i was told order didnt really matter and have had it routed various ways but temps never really change
 

RCoon

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#6
Order does matter, quite a bit in fact :D
Other people on here can shed more light on the order of their kits, but the above-mentioned order is one i see most commonly.
Though your kit certainly looks like it should be able to handle the load after checking it out, the pump looks like its 750 which should be powerful enough. There are dual 600's available though.

EDIT: after researching your order is all wrong... should be going to CPU first, and rad after. Your current setup is cooling the GPU water on a 120mm rad then pushing that hot water to the cpu, which then gets cooled by the 240mm rad and sent into the pump. I'd have the 240 cool the water after gpu and 120 cool the water after the cpu. Please refer to my previously mentioned order.
 
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rhc1690

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#7
yes its the 750 kit i got and almost everywhere i read says the order doesnt matter that much same with fans not a great deal of dif between having them in either push or pull ( i have pull due to lack of room in case, 600t )
 

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#8
After further research, the order can make up to a 5 degree difference, the main issue is with the shortness and bends in the tubing between parts.
Depending upon how many parts you're cooling and the distance between them, and the angle of the bends, defines how fast the water is being pumped.
It sounds to me like your bends are too harsh and/or the tubing is too long for the pump to really push the liquid around the system.
Evidently some people either split the loop or add an extra pump ie RES/PUMP>GPU>RAD>PUMP>CPU>RES/PUMP
Also I am assuming you applied thermal paste on all the blocks?
 

rhc1690

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#9
yes thermal paste applied correctlty and there are no kins etc in the loop at all and tubing isnt that long used just under 2m for the whole loop with shortest tube being 90mm long
 

RCoon

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#10
Can you take a picture of your setup?
If you're certain your setup is perfect after everything I've said, all i can say it get an additional pump or a more powerful one. It was designed for a single dualradiator after all.
 

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#12
Those two tubes from your GPU... damn son... I could be wrong, but they arent exactly helping the pump.
I'm afraid my expertise ends here, all i can suggest is more pump power and less bends.
 

rhc1690

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#13
do u have any suggestions as how to route the tubing using less of it as i cand seem to find a way of using less tubing
 
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#14
Aside from the order that they're in (I would put the 240 before the CPU)

Check the inlet and outlet hose on the CPU block. There is a thread here from not to long ago where someone had put the inlet and outlet hoses backwards on the CPU block, and it made a HUGE difference, like the same problems you're having.
 
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#15
do u have any suggestions as how to route the tubing using less of it as i cand seem to find a way of using less tubing
Is there a way to adapt 90* fittings to the gpu block? I don't know much about watercooling but I bet that would go a long way.
 

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#16
This may be a stupid question, but are you sure you don't have the lines going to the pump/res combo mixed up? i.e. the tube that runs between the CPU block and pump/res is going to the in port on the pump/res and not the out.

Also, what fans are you using on your rads? In your pic it looks like you're running passive.
 

rhc1690

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#17
Aside from the order that they're in (I would put the 240 before the CPU)

Check the inlet and outlet hose on the CPU block. There is a thread here from not to long ago where someone had put the inlet and outlet hoses backwards on the CPU block, and it made a HUGE difference, like the same problems you're having.
im assuming you meant he had the inlet going into the outlet??? if thats what u mean then no mine are the correct way around i triple checked that
 

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#18
This may be a stupid question, but are you sure you don't have the lines going to the pump/res combo mixed up? i.e. the tube that runs between the CPU block and pump/res is going to the in port on the pump/res and not the out.

Also, what fans are you using on your rads? In your pic it looks like you're running passive.
He said they're in pull because of space, but i cant clearly see any fans.
Definitely something wrong with the setup somewhere along those lines, it's all very jumbled to me.
 

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#19
He said they're in pull because of space, but i cant clearly see any fans.
Just went back and saw that.
Something is definitely wrong here.

How are the fans powered? Are they plugged into a fan controller, a fan header on your motherboard, or directly into the power supply?
 
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#20
im assuming you meant he had the inlet going into the outlet??? if thats what u mean then no mine are the correct way around i triple checked that
Yes, that was the problem he had. The inlet on the CPU block is where the water is directed at the baseplate. If you run it backwards, you don't have water doing that.

Another question: What are you seeing for temps on the GPU??? ...if it hasn't already been mentioned or asked!
 
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#21
So, the water runs to the CPU, from there it goes to the 120 Rad, and then to the GPU, from GPU to the 240 Rad and back to the reservoir/pump? Or is it the other way around??
 

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#22
Just went back and saw that.
Something is definitely wrong here.

How are the fans powered? Are they plugged into a fan controller, a fan header on your motherboard, or directly into the power supply?
I keep looking at those tubes, and my eyes are telling me something about them is wrong, but i dont understand what.

So, the water runs to the CPU, from there it goes to the 120 Rad, and then to the GPU, from GPU to the 240 Rad and back to the reservoir/pump? Or is it the other way around??
exactly the opposite way. but what you've said is the way i'd do it.

Another question: What are you seeing for temps on the GPU??? ...if it hasn't already been mentioned or asked!
71 degrees he said.
 

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#23
I keep looking at those tubes, and my eyes are telling me something about them is wrong, but i dont understand what.
The pink anti-kink?:roll:
In all seriousness, I've traced the tubing in the pic numerous times, and it seems fine to me.
My guess would be the flow is going the wrong way through one or more of the parts. Since rads and (most) GPU blocks are bi-directional, that leaves the CPU block (which he said the tubing is correct) and pump/res, which is entirely possible. If that were the case, not only would coolant be flowing backwards through the CPU block, but the heat sources would be before the radiators providing an inefficient cooling solution.
How are the fans powered? Are they plugged into a fan controller, a fan header on your motherboard, or directly into the power supply?
I'm asking this again. If they are plugged in to your motherboard, make sure in BIOS fan control is disabled and if you have the Asus software installed, make sure there are no fan controls set up there either.
 
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#24
Perhaps try switching the hoses around on the cpu block, and if that does not resolve it, try switching it on the reservoir.
 

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#25
I hope I didn't miss something....

If I'm not mistaken, that kit uses the Raystorm CPU block, and the inlet port on the Raysorm is on the right (when looking at it so the word Raystorm is on the bottom and properly readable).

Your picture several posts back shows it to be opposite. So like others said, you need to rearrange.


 
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