How to fight humidity in the tropics? Leave on all the time or off as much as possible?

jb0nez

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May 31, 2012
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I live in Hawaii, on the windward side of Oahu. We have constant wind blowing in from the ocean. There is no AC, the house is naturally cooled with loads of open windows. We're also up on a hill against the mountains and it's insane humid year round, temps 76-86 year round. The humidity is so bad that just leaving some T-shirts in a drawer for a month will cause them to mildew.

I had to RMA my R9 280X at 1.5 years. They told me when they opened it they found green corrosion in the heatsink fins, consistent with salty & humid air (but still gave me a replacement - go XFX!)

Had to RMA mobo at 2 years. Then again at 2.5 years. This is getting old (esp since Z77 chipset mobos are rare as hen's teeth, people on Ebay don't ship to Hawaii [guess they don't know it's just another state and costs no more and is just as fast as east coast to west coast but don't get me started on that]). I have preemie twins as of a week ago so need to keep my 3570k alive for a while.

MSI didn't have replacement Z77a-g45 in 7/15 when I RMA'd, had to wait 1.5 months for them to get stock in. Now they have none and have to send it to China for repair (still in the 3 year warranty!)

So my question is, and I've googled the heck out of it and no clear answer that's helpful to me, in the absence of AC how can I keep humidity out of the case? Dehumidifiers are pointless I'd need industrial size. Those giant dessicant buckets you can get at the hardware store are pointless as they literally fill with water in days to weeks.

So my options pretty much come down to leaving the system on or off.

Leaving it on, so it stays hot inside (and oh man cooling this thing has been a nightmare but I've got it down now), with as many high CFM fans going as possible, and an H80i on my 4.5gz CPU is one option. I know hot air holds more moisture, but I'm already at 100% relative humidity ambient anyway. Maybe keeping it running 24/7 is the best option as it moves air out, components warm and radiating heat so pushing air+water molecules away? Or maybe it's a bad option as it allows MORE salty water molecules to contact my fins/heatsinks/radiator?

Leaving it off as much as possible is option two. But that'd allow humid air to just sit in there in contact with the above and slowly corrode it.

Anyone know which is better? OR have a clever idea I haven't thought of? Throwing dessicant packets in there doesn't make sense since as I mentioned they get saturated too fast to be useful.
Thanks!
 
Solution
It looks like you are between a rock and a hard place, or more appropriately between a wet and a soggy place ;)

I would think keeping the components warm and the air moving is the least bad option, so I would try to leave it on all the time. I'm trying to feel sorry for you, but living in Hawaii, well...............
Have you considered water cooling and sealing of the case? Or you might want to put the PC in a closed closet? I think the salty seawind is your enemy, and even leaving the PC off will affect it. Only sealing the PC off will prevent corrosion. There are also some protective coating sprays available, but I have no experience with that.
 
It looks like you are between a rock and a hard place, or more appropriately between a wet and a soggy place ;)

I would think keeping the components warm and the air moving is the least bad option, so I would try to leave it on all the time. I'm trying to feel sorry for you, but living in Hawaii, well...............
 
Solution

jb0nez

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As mentioned AC is out of the question. House is built like many houses here to passively cool.

The CPU is water cooled with H80i GT. The gtx 970 though is heavily overclocked (to 1531 mhz) so really needs LOTS of air. Maybe water cool it too? But
even with water cooling, there needs to be an intake and the exhaust flans need to blow over radiative. I'm trying to create positive pressure tho I can find nothing on wherthat hejlppressure. So...any more ideas or just keep it hot inside? (or cold?)
 


^^^^ THIS. With AC out of the question, mineral oil is your best bet.

Look up online guides to get you through this (most important part is to not submerge any rubber). One other thing to note is that for your system to be COMPLETELY protected you might want to move to SSD-only storage as hard drives can't be submerged and could corrode just as easily over time when exposed to the humidity.
 

jb0nez

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Oh hey that's interesting.

But I bet it wouldn't play nice with radiators! Probably would obstruct cooling significantly (thinking of my GTX 970 and my H80i GT)