Recent temperature issue

Robzere31

Robzere31

Robzere31

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Joined
20 Nov 2005
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Had my watercooling setup for a few months now & in that time I've not had any problems until the past week or so.

CPU temps have suddenly risen from 55c-60c when gaming to 75c-80c last night.
GPU temps are pretty much as normal around 40c-45c when gaming.
Water temp is around 32c-35c

I've checked thermal paste & found it wasn't looking great to reapplied some AS5
Thought it may be flow rate so turned pump up to maximum but temps haven't really changed.

The top radiator which the gpu feeds into is nice & warm, but the front rad which the cpu feeds into is quite cool which is why I thought it was flow related.

I'm guessing the only other alternative is a full strip down & clean of the cpu block to see if there's anything in there that shouldn't be
 
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are both rads on the same loop? if so, the temperature should reach equilibrium on both.. sounds like a blockage / airlock to me if they are on the same loop ?
 
Yes, both radiators are on the same loop. I don't think there's any air in, but I'll give it a good shake tonight ! :D

Failing that it looks like my weekend consists of stripping it down for a clean::(
 
zeegy said:
Just wondered how you got on with this? did you find the issue?
Click to expand...

Not really sure, I swopped cpu block over the weekend to an EK supremacy, changed water, bled the system new paste & temps are pretty much the same.

I'm leaning towards the fact that room temps are currently 28c that it's just the way things are.
To be fair, a couple of hours playing Doom last night gpu hit 42c & cpu 55c with one spike at 65c for about 1 second.
Running realbench for 30 mins showed cpu hitting 70-75c max

Without resorting to delidding the chip to re-apply the rubbish Intel paste I'll just live with the temps for the summer.
Once the ambient temps drop I'm sure everything else will as well.
 
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String said:
Both radiators should be the same temperature, surely?
Click to expand...

Fair point, I've really no idea what the problem was, but I'm pretty sure theres no blockage or flow issue.
I'm going to remove the front radiator tonight as it's mounted vertically & see if having it horizontal causes it to move any trapped air that maybe in (pretty sure there isn't)
 
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Vertical radiators can trap air. Try running heaven for a while to heat the fluid up and then feel the radiator to check that maybe it's warmer at the bottom than the top?

You shouldn't need to remove the radiators, just turn your case upside down?
 
I've run realbench stress test for 30 mins & while the front rad does get warm it's not as warm as the top one. Heat on the front rad is pretty even
CPU hit 70-75c during this while games tend to see 55-60c

The case has been moved around in all directions to expel any trapped air as I put new fuild in last night.
Will have another fiddle around tonight to see what happends.
 
Robzere31 said:
I've run realbench stress test for 30 mins & while the front rad does get warm it's not as warm as the top one. Heat on the front rad is pretty even
CPU hit 70-75c during this while games tend to see 55-60c

The case has been moved around in all directions to expel any trapped air as I put new fuild in last night.
Will have another fiddle around tonight to see what happends.
Click to expand...

That could be down to better air intake cooling the front rad. If temperature is even in the rad then maybe it's all good. The cpu isn't overly hot at 75c.
 
Sounds a little odd to me, i would have though turning the pump speed up would equal out the loop temp. The top rad might be hotter if it has more surface area inside through having more passes, might be better off feeling the tubing froim the outlet on each rad to see if theyre fairly even temps rather than feeling the rad.
 
Quick update,

Changing the block had no affect on temps, but it was a planned change anyway for asthetics. Prefer the look of the EK block with the clear top.

However, the room temps have dropped 8-10c the last day or so & computer temps are no back to normal. CPU 45-55c & GPU 40c

Guess it was just down to ambient temperatures.
 
The root cause of unexpectedly hot running for me a few years back was rust in the loop. One of the fittings had corroded badly enough to almost block the tube. This probably isn't your issue, but a serious blockage in the pipe between the two radiators could lead to one being hotter than the other.
 
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