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Old July 20, 2009, 10:15 PM
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MpG MpG is offline
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No, it's not just a marketing ploy. The watercooling tubing is much more flexible, and can bend tighter without kinking. Some tubing, the Primochill LRT for example, is also anti-microbial, so you need to get any additives to prevent algae build-up in your system. Little things like that account for the higher cost, and they can go a long ways towards making installation easier. But you won't see any actual performance benefit between the different kinds.

In my own experience, the hardware stuff is rarely circular - it's usually a little flattened, since it's been sitting wrapped on a roll so long. And a lot of it kinks if you so much as look at it funny. But in a pinch, you can certainly use it.
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