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Can't decide on Lamptron FC8 or FC9 w/32 GT AP15's

post #1 of 7
Thread Starter 
I'm looking to control 32 GT AP15's in my next build. 16 will be used as intakes with filters on them, 8 on radiators in push, and another 8 on radiators in pull. The two controllers I'm looking at are the Lamptron FC8 and the FC9. If I go with the FC8 I'd more than likely run 4 fans on each of the 8 channels and if I go with the FC9 I would run 8 fans on each channel. If I go with the FC9 then I'd be able to control all 8 fans on each radiator (two radiators with 4 pull and 4 push fans) simultaneously on one channel however that would mean I'd have to run extra Y cable adapters and I don't know if having more adapters and extensions will impact performance.

Anyway, what kind of pros/cons can you guys share between these two? Am I totally off base on what I'm expecting these controllers to handle? Is there a better way to do this? Any help would be greatly appreciated.

*** I asked this question yesterday in the air cooling sub forum and didn't really get the information I was looking for so I posted here. If I'm breaking any kind of rule I apologize. ***
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post #2 of 7
Someone won the lotto lol. Also you don't need AP15 for airflow. Just radiators.
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post #3 of 7
Thread Starter 
I could go with Noiseblockers for the intakes but the GT's are cheaper. I'm sure there are a lot of other fans that are just as quiet when under volted and cheaper but since the 16 intake fans will have to pull air through filters I figured I'd need the extra power and I want something that I know works. None the less that doesn't help me with my question about the controllers.
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post #4 of 7
GT AP 15 are low amp/low watt fans. Even with 8 on 1 channel you will only be ~1 amp/12 watts per channel. And instead of running at 1850 rpms, they will run closer to 1750 rpms, regardless of which controller, regardless of number of fans on a channel. Just using any rheostat has that issue from drop over rheostat.

So either controller, fan speed will be same.

And on frozen cpu you can get phobya fan cables to connect 3, 4, 6 or 9 fans to single channel, like 4 fan cable here or 9 fan cable here.

The 8 channel will give you more options. I would probably go channel 1 = rad1push, channel 2= rad1pull, same for rad 2, then use other 4 channels to tie together fans I would probably run same speed.

so really 4 vs 8 controller, if using 4 makes sure there arent more than 4 groups you want to run at similar speeds.
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post #5 of 7
Thread Starter 
Thanks, that confirms what I had already believed to be true. I didn't know if going one way or the other was more beneficial or would cause more/less stress on the controller. If I went with a 4 channel controller and ran 8 fans per channel using one of those 9 fan adapters I would more than likely need to use a couple of extensions to get some of the more far reaching fans connected. That being the case would I run into issues with the wires getting hot or failing because of the additional load on them?
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post #6 of 7
I have been running similar setups before, it is not an issue. Unless you do something silly like throwing an in-line resistor before the split that cannot handle the load. biggrin.gif
    
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post #7 of 7
I think the most fans I've run on one FC9 channel was 6x YL high speeds. But I have (and still run) a pair of D5's on two FC9 Channels, with the 6 YL on a channel and 4 YL on the last.
I also run a FC8 on the same rig and currently have 10-11 fans on it. Another choice of controllers might be the 6 channel/50 watt one from NZXT, can't think of the name right off hand.
The shortcoming of the FC9, if it you consider it one, is that according to a fellow OCN member the FC9 varies the voltage of the negative leg. This means if you plan to hook an rpm wire from one of the fans up to some other device for monitoring you may have problems getting it to detect anything other than the wide open setting (because then you're back to parity on the voltage thing).
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