Originally Posted by ngzb
Darlene if i connect 19 PWM fans + 3 rpm fans + 1 D5 PWM pump to an Aquaero 6 , will i need the passive cooler ?
Picking up where the others already mentioned . . .
The A6 doesn't work with the PWM D5 as it comes out of the box.
The PWM D5 doesn't exactly follow the Intel PWM standard with regards to the pull up resistor on the PWM line to 5V.
The PWM D5 also only runs at 60% speed with no PWM signal, instead of the usual 100% that comes with a 5V pullup. . . . . Seems to be a design trade-off on their part.
The 19 PWM fans, as long as they are not Corsair's PWM fans, should not be a problem, as long as you use appropriate splitters to power them from the PSU, and only send 1 tach line from a group back to the A6 channel controlling it.
The 3 voltage controlled fans, again assuming commonly used PC/rad fans, should not be a problem on 1 channel set for power or rpm control.
The A6, like most controllers, becomes the warmest at mid speeds with voltage controlled loads, when that channel is more heavily loaded.
For the capable DIY'er . . .
While not as optimal a solution as the active component based solutions, this is a workable solution to the issue of having a PWM D5.
I've tried it on a single and a dual D5 setup and it works satisfactorily with pullups optimized for each case, and it's dead nuts simple, though not exactly elegant.
At issue is that the D5 needs a fairly "strong" pullup, (lower resistance) . . . while the A6 works best with weaker pullups, (higher resistance).
It would seem, although I can only speculate, that the A6 has some protective resistors built into its PWM control to limit current in an unanticipated situation.
The active component PCB solution offers the best of both worlds; the A6 sees a weak pullup, while the electrically independant D5 sees a stronger one.
DarleneEdited by IT Diva - 3/12/14 at 4:58am