Originally Posted by BabylonDown
Is this what you are referring to when you talk about daisy chaining the fan splitters?Warning: Spoiler! (Click to show)
Would I then run the far left 4 pin female connector into the CPU_OPT or CPU_CHA header, run the far left molex to the PSU and then connect as many fans as there are fan attachments from the two splitters? Is there a limit?
I am very curious about running PWM fans instead of using a controller.
I am just unsure how effective that is running the PWM off the CPU. Wouldn't there be a ton of throttling, which would in turn throttle your radiator fans constantly?
Wouldn't this have an effect on performance? Especially if the water inside the radiators aren't being cooled after heavy loads?
so far as "daisy chain" the PWM splitters... you take one splitter and hook the CPU lead into the CPU or CPU OPT header on the mobo, then you take the second splitter and hook the CPU lead of the that one to one of the FAN leads of the first, so all fan plugs will have PWM information from the mobo. It costs you one fan lead on the first but you gain however many additional leads on the second. You need to hook both splitters up to MOLEX for power. With those splitters all the power is coming directly from the PSU - all you are taking off the mobo is signal. I'd guess you can hook as many up as there is signal strength for. I would guess it would degrade after being divided out too many times but what the limit is, I don't know. (I'd love a device you can plug in one pwm signal and have it maintain signal level to multiple headers.
Yes, I think you will find that all of your chassis fan headers are voltage controlled and not PWM controlled. There are many threads discussing this around. Some of the manuals specify +5v on the 4th wire. Mine specifically says PWM.
I'm not sure what sort of fan speed variation you will notice. I basically only surf the internet and play bf3/bf4 with my rig so when I'm surfing it's super low and quiet and when I play it turns up fast, I don't really notice incremental differences in anything except the main video card's on board fan which does throttle some depending on how quickly I scroll through graphically intense pages as it gets up towards 55c. If the fans are temperature controlled they'll turn down after the temperatures are down, so warm water in the radiators shouldn't be an issue - but liquid cooling PCs isn't my thing. I am an automotive technician by trade (13 years tomorrow!) so I do understand the principals - however I'm sure some of the guys who run under water on here would have additional information to offer.
I am becoming more interested in water cooling since having gone crossfire and the additional air volume and noise associated with keeping the top card at / around 70c but I also enjoy the simplicity of cooling with air and how neat heat pipes & radiators look. Plus my GPUs aren't really worth water at this point as they're dated.