CPU Temps Too High?

CPU water cooling blocks...
TheHackMan
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CPU Temps Too High?

Postby TheHackMan » Mon Aug 05, 2013 10:21 pm

I have an i7 3930k with a Koolance CPU 380i block and right now with no overclock and sitting idle the CPU temps are reading between 45C and 50C. Under full load I see temps between 75C and 80C. There is no way this is can be normal and I am at my wits end trying to figure out why. I just upgraded from a CPU-360, which served me will with my 920 and for a while with my current 3930k, to the CPU-380i and temps I recorded prior to switching blocks show no change at all which I find strange as I figured I would see a drop of a few degrees at least.

The CPU is on its own loop separate from the graphics cards. Components in the loop:
CPU-380i
MB-ASSTX79
140mm 30-FPI Radiator (HX-CU1401V)
1x 140mm CoolerMaster Fan (Pull Config)
PMP-400
Tubing: 10mm x 13mm (3/8in x 1/2in)
4x Compatible QD3 fittings
Using IC Diamond 7 thermal compound


Is there an orientation for better performance for the block? I currently have the logo pointing to the right, would pointing it down have any noticeable impact?
Is there something else I might have missed or may not be considering?
I do plan on testing a different fan and also trying a push pull config instead of just a single fan in pull configuration to see if that helps.

Izerous
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Re: CPU Temps Too High?

Postby Izerous » Tue Aug 06, 2013 5:25 pm

When I moved from a 360 to a 380 I saw significant gains, my suspicions are that you might be reaching not the limits of the block (since your said your temps are the same) but at the limits of either radiator or even more likely the fan on the radiator.

I would clean and remount the block with another application of paste to ensure a good mount them try swapping out the fan.
Corsair 800D
2xPMP-450S > Amd FX8370 > Asus CH4-EX > AMD 6990 > AMD 6990 > 2x1080 rads > return
32GB Ram

TheHackMan
Water Pistol Grunt
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Posts: 2
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Re: CPU Temps Too High?

Postby TheHackMan » Tue Aug 06, 2013 9:46 pm

I just swapped out the fan and dropped two new ones in there in a push/pull config. Under max load I am seeing my temps around 60C with occasional peaks of 65C. The old fan, upon further research, I found it only had a static pressure of .75mm/H2O and was pushing around 50CFM. New fans have a static pressure almost double that and are rated at around 85CFM, and I can actually feel the hot air being pushed out the back.

Izerous
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Re: CPU Temps Too High?

Postby Izerous » Thu Aug 08, 2013 8:21 am

That is one of the reasons why even though they are the ugly color they are why I have stuck with the Noctua NF-F12 120mm fans for my radiator. At full speed their static pressure is 2.61mm H2O but still fairly quiet.

As nice as 140mm rads are for being quieter it really does seem harder to find balanced fans in that size.
Corsair 800D
2xPMP-450S > Amd FX8370 > Asus CH4-EX > AMD 6990 > AMD 6990 > 2x1080 rads > return
32GB Ram


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