Originally Posted by raemen
Hey guys I seem to have a problem with my Antec Kühler H2O 920, I hear a weird noise that it makes. Kind of like those regeneration noise from game, or a spingy noise. I have noticed that evertime it makes the noise the noise of the fan changes. When I set the fan setting to silent then it stops making the noise. Shoud I be worried about it, is it defective? Or could it be because of dirt build up. I have it set so it takes air out the back of the case.
1) is your radiator above or below the processor,
2) are your hoses on the pump lower or higher than the radiator.
Judging by how I can hear sloshing when I shake My radiator, tells me it's not completely filled with liquid. You need to orient the radiator so that the hoses coming out are not the highest point, or air will get out to the pump. Also, if you have your radiator mounted lower than the processor, you may want to try starting the computer up with the radiator oriented higher somehow, (lay it down, take the radiator out and hold it above the processor but careful may get hot, etc,...) these have been posted in the past, but are buried in 116 pages of posts. These are just things to try to see if maybe the pump sucked air, and these steps will force the air out. If these steps don't work, you may just have a pump thats a little loud.
Also, if your sure it's the fan not the pump, ignore that and check to make sure a fan isn't hitting against the back of the case. You said you have it pulling air into the chasis? Any fan will go lope-sided if shaken. It may tap against your case when the speeds are drastically changed. If you think its the fan, take the one closest to the chasis loose, and see if it has marked your case/ fan blades.