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Unusually High Temps with a New H100i v2


The Astronomer
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I have a brand new H100i v2 on an i7 8700K and the BIOS is reporting temperatures in the 41C to 45C range, which is odd considering I am not doing anything in particular with it. It seems high considering it's idle and it's cold in my basement. Room temperature is maybe ~70F. Not exactly hot...

 

The motherboard is an ASRock Z370 Extreme4 and it's in a Thermaltake Suppressor F31. I have the CPU fan connected to the fan header labeled CPU fan/water pump. The fans themselves do spin as expected. The Corsair Link cable isn't connected since this is a new build and I'm not even into Windows yet.

 

I did have to remove the cooler from the case and I didn't apply new thermal paste. I bought more and intend to reapply a fresh set so if that's all I need to do, I plan on it.

 

Is there anything else I should check? I'm new to AIO coolers like the H100i v2 and this is a new build... rather not break it out of the box.

 

Thanks for any help!

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At this point, I don't see any cause for concern. It's possible that your motherboard is provide a bit too much voltage to the CPU but it's too early to tell definitively.

 

Once you get into Windows, you'll want to watch the following variables:

1) CPU Package Temp

2) Radiator Temperature (reported in Link ... you'll need the USB connection for this)

3) vCore (vCPU in Link)

 

Also, make sure to take a look at the cooler FAQ linked in my signature.

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Are you sure you didnt not connect the corsair link cable. How did the cpu turned on.

 

You should connect the usb cable which is the power to the pump. You dont have to install windows do make it work.

 

Read the manual carefully. It is good that cpu never hitted 100 being lucky.

 

Ensure you apply the thermal paste properly . if this is new cooler it should have pre-applied one which is suffice.

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Check in the Bios that the CPU_FAN header is getting 100% power as that is what powers your pump, (unless you have a SATA cable from the pump, but I don't think that you do). It is also recommended that if you remove the pump from the cpu, you clean the old compund off and replace it with new, making sure not to use too much. The USB cable just allows Link to communicate with your cooler.
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Thanks all. I got Windows loaded up and was able to configure the cooler a lot more. I've got it running at sub-25C when idle so that's a massive improvement from what the BIOS was showing.

 

I also made sure my fan header was at 'Full Speed' based on the BIOS for my ASRock board. Seems to be running just fine. I'll know more when I do a CPU stress test however.

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In the default configuration, the Kaby lake tends to run full tilt in the BIOS. You likely got to see that on the first boot and now it behaves better with your settings. I see this as well on my platform with a few minutes in the BIOS leading to higher than normal idle coolant temps once I get to the desktop, which then drop a slightly with at a relaxed frequency.
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