Corsair h115i / 8700K: Quiet but hot

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angelblake

Commendable
Oct 14, 2016
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Hey guys! I got a question, never had an AiO before and after a recent upgrade, I have now an 8700k at 4.9Ghz (1.35v) cooled with a Corsair h115i. The latter's fans are loud past 70% (1300-1400rpm) but the CPU stays relatively cool at 50°C at 50% load.

I did an experiment yesterday, setting a custom fan profile, 40% til 60°C and maximum 60% gradually past that (up to 95°C). I was wondering if with an AiO, this could be dangerous, I mean there's water inside and it does expand and evaporates.
 
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J
but there is no air for the water to evaporate into.

There is something called vapor pressure that will keep it from boiling.

....also....water expands an extremely small amount. It is negligible.
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mdd1963

Titan
Jan 14, 2006
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AIOs should try to stay ahead of the heat, as, once the fluid warms up, it cools less effectively leading to warmer temps, essentially a thermal runaway....

Best to stay ahead of the heat, attempting to dissipate it before it warms up the fluid as much....; I'd keep the fans as high as comfortably possible when beginning gaming, etc... (Certainly, surfing, etc., is much less of a cpu load)
 
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Barty1884

Barty1884

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Apr 16, 2015
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Assuming those temps are based on the CPU temp?

1. 95'C is way too hot. Yes, TJunction is 100'C on the chip, but you should be aiming to keep it <80'C

2. How long are you running stress tests for? AIOs will take time to equalize (as the liquid temp increases). So 95'C on the core after 5 mins of a stress test) as an example, will in all likelihood be >100'C after 30-60mins of stressed usage.

As jay mentioned above, expansion is negligible..... and yes, while permeation does occur, it's not significant - and built into the anticipated lifespan (and warranty) of any given AIO.
 
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angelblake

Commendable
Oct 14, 2016
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I mostly just game, during demanding scenes (Battlefield 1, a 64 players map) 60% load and 65°C, before the custom fan profile, it was around 55C.
 
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