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What does this mean with temps & blocks?

I

Igg

[H]ard|Gawd
Joined
Oct 4, 2002
Messages
1,337
Now that I got my rig running for a few days, I've noticed a few odd things.

With system underfull load, my CPU will quickly shoot up to 42C and then hold stable, then within 2 minutes of the load being idle, it goes back down to 33-34C.

Now the odd thing is that the NB block, (Twinplex), will quickly go up to around 41C and hold there but will take its sweet time dropping down.


Does this mean I have a bad contact on one of the block?
 
It's possible or it may mean that your chipset block just doesn't transfer the heat from the chipset into the water fast enough to cause sudden decreases in temps.

The wattage from the chipset is pretty much a constant all the time unlike a CPU/GPU. The chipset is basically running near it's max potential in terms of wattage produced from the time you fire your PC up until you shut it down...the reason that you see it's temps going up under load is that the rest of the loop is adding heat to the coolant and impacting the amount of heat the chipset block is able to shed.

If you suspect the contact is bad, remove the block and inspect the die for the contact patch, if it's good reapply your thermal grease exactly the way you did previously if not modify your method, re-attach the block, let it set then remove it once again and inspect the contact patch.

Keep repeating that until you have good solid contact (but not excessive grease) then you've got your application method nailed and you can sleep better at night.

Personally every new piece of cooling equipment I add to a system goes through that process just because I'm paranoid about voids.
 
Ah ok thanks.

Make sense why sometimes the MB chipset is hotter then the CPU hehe.
 
the chipset still shouldn't be hotter than the processor, a downclocked idle cpu should still put out as much heat as the chipset.
 
Are these temps reported by your motherboard or are they water temps you are measuring?

It also may help to lap the block if you are not getting good contact.
 
My suggestion is you measure your water temps. If you don't want to flip for an Aquaero then you can get a Tt unit for about $30 that will give you more meaningful information. The motherboard sensors are notoriously inconsistent and quite often do not report correct temps. The only thing that is really useful in a water cooling situation is your water temps assuming that you are not having any block contact problems.
 
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