CPU overheating with AIO?

DaJesuZ

Commendable
Oct 27, 2016
4
0
1,510
Over the past few days my system has had horrible temperature spikes. My CPU has been idling around 60c, with Max temps around 70c after booting and settling down (this is under normal use, browsing and file browsing etc, not gaming or stress tests. Ran CinR15, caused thermal shutdown).
The AIO I'm using is an H115i, 280mm rad, with a couple Noctua Industrials, so there is more than enough cooling for the chip.
I've made sure the fans are clean, and the fins are clear, so airflow isn't the problem.
The chip is a 6600k, which I did have at 1.35v at 4.6ghz. When the temps started doing this, I killed the OC. Voltage is now at 1.17v at stock speeds, so voltage isn't what's causing the temps.
The chip was delidded some time ago, and a crap ton of Arctic Silver 5 was used to replace the garbage Intel uses as thermal compound, and there's more than enough below the water block.
The only think I can think of that's doing this is a defect with the AIO. I don't know what the defect might be (failing pump, or air in the loop), but any help would seriously be appreciated.
 

DaJesuZ

Commendable
Oct 27, 2016
4
0
1,510
Yes, I have. The pump is at its max of about 3k RPM, and the outflow tube is seriously warm, while inflow is much, much cooler, so there is circulation going on. Not sure how much, exactly.
 

krells

Distinguished
I haven't ever had to delid a cpu but it seems like "pump out" is an issue if you use standard paste instead of liquid metal under the heat spreader when you delid. If you have no contact on the heat spreader your temperatures would make sense.
 

DaJesuZ

Commendable
Oct 27, 2016
4
0
1,510
Linus did a video back soon after Skylake launched, showing that replacement of the thermal paste results in better temps, but he didn't see it as justifiable. I made sure there's plenty of paste under the IHS, since on Skylake the IHS doesn't make contact with the heat spreader, anymore.
I made sure there's a LOT more than necessary to ensure complete contact of the die to the IHS via thermal paste.
This started before I delidded the thing. I did that out of interest, more than anything.