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2 Posts tagged with the liquid_cooling tag
7

I figured that while I was at it, I'd throw a couple of tips your way about putting together liquid cooling components.

1. Do not use grease or any other lubricant to ease the process or push/pulling tubing over nipples or flanges. Doing so will contaminate the cooling system. In this case it will probably have no more effect than discoloration, but if you must use something, make it a dab or two of the coolant.


2. Do not use tools such as pliers unless they're extremely well padded. Even then they allow you to apply too much force in the wrong direction making it way too easy to damage components. Instead, use a rag to cover the tubing for added grip. Most people have the strength, but not the gripiness or pain tolerance to force the tubing on. Work gloves with grippy palms are optimal. You won't believe how much of a difference this can make in all sorts of lifting and grabbing applications. I learned about this simple but remarkable trick when I had a moving business back in the day.


4. DON'T SKIP USING CLAMPS, even if you forget to put them on the tube the first time, Pull it off and start again or you WILL have liquid all over the interior. While the connection may seem uber-tight now, heat and pressure will soon loosen it and have coolant leaking all over the inside of the case.


5. Use coolant, or if you simply must use water (it actually dissipates heat better), make sure it's distilled. Otherwise, you'll soon see minerals and other gunk lining the tubes and the same gunk will be reducing the effectiveness of the radiator.


IMG_3670.JPG


IMG_3674.JPG


Notice that there's a fan on top. Why liquid cooling if you're going to put a fan on top? Actually, as far as I can tell, it's not actually for anything except to keep air flowing in the case in the proper direction (front to back). It lights up though!


Cheers Jon

P.S.

6. Once you've added liquid and started the machine, leave the cap off for a few minutes so the air bubbles work their way out more quickly with the zero back pressure.


7. You'll need to add more coolant once the intial batch has worked it's way into the tubing and radiator. It took about 800 - 900 milliliters to fill the 3D Mercury.


8. You might want to use a funnel as these bottles have very narrow necks and just in general to reduce spillage.

The Gigabyte coolant is very thin, much thinner than automobile coolant so don't go trying to use the latter without reducing the concentration significantly.


So far the BIOS monitor says the CPU is running at 36 centigrade which is about 5 degrees cooler than with the Zalman. However, don't put too much stock in that. I've seen the monitor jump between boots for no apparent reason. The thermal diodes aren't always as accurate, or interpreted as accurately as you might suppose.

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6

Cool, Kewl, Kewlio

Posted by jonljacobi Mar 22, 2008

It seems that Gigabyte never considered a dual-CPU system when they designed the plumbing for the 3D Mercury case. It was only when I started installing the second CPU block that I noticed that the feed nipples on the distribution blocks aren't all the same size. The company apparently only envisioned the two auxiliary spigots feeding less needy components such as the chipset and graphics card via tubes of lesser circumference. Can't say as I blame them. It's been a long time since the last multi-CPU craze.

Looking at the photo below, the CPU feed is on the left, the middle feed shows the smaller nipple, and the third feed is the smaller size capped, giving it the appearance of being the same size as the first at first glance... (the large tube hanging free is from the second CPU cooler block)

IMG_3601.JPG

Notice the flow control valves on the two secondary feeds.

The upshot is that I'm either going to have to run the CPU blocks in series off of one pipe, which has the advantage on cutting down on tubing but means cooling two CPUs with one feed, or find another distribution block with two of the larger size nipples. Running both CPUs off of one line might not keep the CPUs cool enough. I could opt for another cooling solution, but that would really cut down on the kewl factor, and you know it's all about the kewl. B-)

There is an interesting closed system liquid cooler from Asetek (seen below) that I might consider but we'll have to see. I have an email in to Gigabyte about another distro unit. I'll definitely be trying the serial approach before I do anything, though I'll be paying close attention to the hardware monitor in the BIOS when I first hook it up. Currently, the QX9775s are running about 29 to 31 degrees centigrade under low load conditions with the Zalman coolers doing their thing.

lclcsmall.jpg

Cheers, Jon

Addendum: After a comment from a reader, I realize the best approach would be to use splitters. Running in series would mean already heated coolant for the second CPU so it would run substantially hotter--not a good thing. I'll pick up two, one pre-, one post.

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