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Old April 14, 2008, 11:38 AM
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Looks like i might be able to source 4x of them from domino on his FS thread, checking for all the details now! (Gottam make sure theyre the sleeve bearing ones tho. )
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Old April 14, 2008, 02:57 PM
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im only using Silverstoneteck fan,

i have only those in my both dfi rigs with armor case and they move alot of air, good air pressure, come with a fan controler, fan grill and all the mounting hardware

im using FM121 fan, (white one) and they are nice and quality fan. i wouldn't use them @ 12V because they move 110CFM and make noise but @ 7V or on the fan controler provide with them you cant beet it
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Old April 14, 2008, 03:22 PM
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Hmm... I didn't think YL made anything but sleeve bearing fans. That aside, if you're mounting the fans horizontally, you might wish to avoid sleeve bearings, since there is a considerable amount of evidence pointing to a high-than-normal failure rate for them when mounted as such. (Incidentally, the Nexus fans are cherry-picked YLs, if you weren't aware.)

Personally, if you're serious about shutting the rig up, I'd take a hard look at Noctua's P-series fans. At all rpm's, I've found them noticeably superior to both the YL and the S-flex series. Using the included in-line resistors pulls them down to 900rpm, at which point I can barely hear them with my ear right next to them. I find the other fans usually need to be reduced by another 100-150 rpm before the same quietness is achieved.
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Old April 14, 2008, 03:41 PM
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Maybe I messed up. I thought the Sleeve bearings were Better for both horizontal and vertical mounting, but as you say, it is the Ball Bearings that are better? I'm confused...
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Old April 14, 2008, 05:35 PM
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Sleeve bearings tend to be prone to unequal lubrication issues when mounted horizontally, whereas other types are more consistent, regardless of their mounting angle.
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Old April 14, 2008, 06:31 PM
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Interesting... Learn something new everyday!
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Old April 14, 2008, 09:16 PM
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In all fairness, they're prone to lubrication issues. The evidence, while considerable, is largely anecdotal across forums everywhere. I've personally never seen a manufacturer admit to it. Some company out there probably has a sleeve bearing design that overcomes this issue. There are probably vast numbers of people who run them horizontally and have them last a million years so far. Just like we've all got a relative who smoked three packs a day and lived to be 120.

So this phenomenon is not absolute, but it's most definitely documented by this point, and avoiding them might save you a little grief.
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