Jckf Posted September 14, 2013 Share Posted September 14, 2013 The fan controller on my brand new H100i is acting very weird in conjunction with any 3rd party fans I connect to it. As you can see in the attached image, it drops the fan voltage every now and then, causing the fans to spin down. Fan 1: Noctua NF-P12 Fan 2: Noiseblocker Multiframe M12-S2 Fan 3: Stock Corsair Fan 4: Stock Corsair Fan 2 drops every other second, while fan 1 only every now and then, but the stock fans behave just fine. It does not matter which output on the H100i I connect to, as the drops happen at the same rate for each fan either way. Connecting a second Noiseblocker M12-S2 yields the same "drop rate" as for the first one. This indicates to be that the dropping has something to do with the fans' wattage. The Noctua fan uses 1.08 watts (0.09 amps at 12 volts), while the Noiseblocker fans don't specify anything. The stocks fans are labeled with 0.36 amps, which means 4.32 watts. Is this a known problem, and can I do anything about it? EDIT: More significant drops can also occur. I can both see and hear the fans spin down. This is with both Noiseblockers. EDIT 2: Removed comment about max current/effect. The max values are 4 amps total, 2 amps per fan. That is P = U * I = 12 * 4 = 48 watts total, and P = U * I = 12 * 2 = 24 watts per fan. So I am well within the limits. Link to comment Share on other sites More sharing options...
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