Tom said:
Well, both cooler fans are the 4-pin type and the "tail" of the Y is a 3-
pin going into the 4-pin on the motherboard. So, doesn't seem like it
would make any difference assuming that the alternate CPU fan MB input
could see the RPM signal. I think the problem is that we have both fans
as well as the pump running off of the 12V MB fan connector. After
reading the box, that's up to 1.6A thru that connector. Oh well, guess
it can handle it.
Plenty of airflow from the 2 fans as my "adjustment" of the holes moved
the radiator/fan assembly about 3/4 inch away from the motherboard. In a
previous post, which looked like a lot of garbage, I tried to post a jpg
of the arrangement, but if you take a look at the CoolerMaster HAF 935 I
have put everything into the large bottom half with the radiator fans
blowing up/out of the case. Pretty slick really.
Tom
The fan headers don't have fuse protection. (Whereas
all the USB ports have Polyfuses.)
If you manage to burn out the fan power rail, you can
use adapters like this to power the fans.
http://ep.yimg.com/ay/yhst-24067115789173/3-pin-to-4-pin-with-rpm-sensor-cb-334-11.gif
That adapter has:
1) Molex disk drive connector, for +12V and ground.
2) Three pin female with single yellow RPM wire. That goes to
the CPU fan header, to tell the motherboard that the
thing is spinning.
3) The shrouded male, connects to the fan. That's the
connector on the right of the picture. The shrouded
design is intended to prevent accidental contact between
the male pins, and electrical items inside the computer.
(I've made home-made cables, with the un-shrouded male
on mine, but be very very careful
)
Some motherboard manuals list per-fan header limit as
well as a "sum total 12V fan rail limit". And that
section of the manual, never explains any of that
to my satisfaction. They just plunk down some numbers
and leave the rest to the imagination.
The 37-603 connector here, has a rating of 3 amps,
which is unbelievable. I've used products from this
place to make cables up. For example, I have some
37-602 connectors right in front of me now, and I can't
believe that thing is rated at 3 amps. The pins
provided in the bag are relatively substantial, and
the mating (male) connector has 0.025" pins. It looks
more like a 1 amp pin than a 3 amp pin.
http://mode-elec.com/pdf/connectors/37-6XX.pdf
So if you believe that spec, then 1.6 amps
to power the whole cooler is not a problem
(as far as the connector itself is concerned).
But the track inside the motherboard can be a limitation.
And with no fuse protection, they've designed the track
to function as the fuse. We need the motherboard maker
to tell us what that limit is.
HTH,
Paul