I'm not gonna claim mine look pretty on the inside but they definitely work and are pushing air in the right direction.
SILENZ 100 CASE FAN INSTALL
It's about a million times easier to install in the HDIO than the Omni due to the space in the case and access to bolts etc etc. If anyone is savvy on the electronics/fan front, let me know if you think I've made a horrific mistake or if these are all good! Does this make me the first to take the plunge on the Omni? I've just today switched out the fans in BOTH my Omni and HDIO. I used scotch locks to connect the old wire to the new fan and small tie wraps to neatly keep the wire in place. I have been running it for about 3.5Hrs now and I still can't hear the fan running but I can feel the air gushing out.
This fan is not only quiet but it does a better job then the stock fan.
I took my time meticulously installing the new fan today and I must say it went well. Not sure if it voids the warranty but I couldn't find any security seal and I kept the old fan around to swap back out in case I had to send it in. You can carefully pull the pins out by pushing gently on the pins in the connector with a pointy tool. Also make sure the polarity of the fan is correct so it's not drawing air into the unit, but pushing it out. You can just tape it off to the side or snip it off since it isn't used in the HD i/o.
SILENZ 100 CASE FAN PC
Also since it's a PC fan it has a 3rd lead that is for the temperature sensor. You have to pull the connector off of the original unit and put it on the new fan. I'm assuming that you have the MacPro (in it's original Apple provided case) sitting inside the plexiglass case (like it would be if the MacPro was sitting in a rack mount) right? I'm also assuming the fans are actually mounted to the plexiglass case. And your plexiglass case would be better with the opening at the top of the case and not the bottom - heat rises you know. The side panels may be barely warm but do you really know how that is being accomplished? I mean - is it really happening the way you think? You say it's working flawlessly but you could get better by just, as I said previously, removing the Mac's internal fans and going with the external ones. The noise on the silenx is just below the macs fan, unless I set the controller to MAX then it can be heard. It's in a plexi glass case with the bottom rear open. I took all that into account when I built it. The sync issue did cross my mind, but it's working flawlessly and there is an escape exhaust on the rear. After the set up, now it's just barely warm on 8+ hours of using it. After 8-12 hours on mixing the side panels would get pretty hot to the touch. True, however I had installed this set up a year or less after I had the Macpro 8 core and after a good 5 hours it got quite warm. The other thing is to make sure you have plenty of room on the exhaust side of the computer for the heated air to go away. I should know - as a day job decades past I used to work on cooling systems for process control machines and computers as an engineer/tech. Would be far better efficiency and cooling. You might be better off actually removing the internal fans if you're bent on using this setup. The external fan could be pushing air against the fans blades of the internal fans is what I'm talking about. Unless you've got the internal and external fans running in sync you could be not getting as much cooling as possible from the setup. It's a huge difference on long mix sessions that are 8-12 hours. It came with a control module that can hold up to 5 fans for speed.
SILENZ 100 CASE FAN MAC
The fans are to big to fit inside the mac pro, I have 2 on the front, right in front of the fans inside aiding (pusing air in the same direction) as the internal fans and 1 on the rear pulling air out.
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