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30mm rad with one fan vs 60mm rad in push-pull at low speeds? - Page 5

post #41 of 45
there are no orange wires on my molex connectors. i have a 12v, a 5v and 2 grounds.

pachaz, monitor your water temps to see the difference the fan speed makes. if you dont see a drop in cpu temps with higher fan speeds, yes you need to delid to get lower cpu temps.
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post #42 of 45
Yeah right. Molex connectors don't have an orange 3.3V wire. It's the sata connectors that do.
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post #43 of 45
Fashioned a switch as suggested and it works great. My fans start up fine at 5 volts. I had based an earlier 5v test on an adapter with a resistor and when I measured it today it was delivering less than 5 volts. This is perfect for my needs as I can kick them to 12 when I'm benching on Hwbot and leave them at 5 the rest of the time. Thanks!
post #44 of 45
I'm glad you like this idea.
Now, if you want your fans a little faster than 5V provides, you can do the following to get a 12/7V switch instead of a 12/5V switch.

You plug your PSU's yellow 12V wire to your fan red wire.
You plug your fan's ground (black) wire to your switch middle prong.
PSU ground (black) to one of your switch poles.
And your PSU 5V (red) wire to the other pole.

When the switch is on ground, you get the full 12V.
When the swith is on 5V, you get 7V (12-5=7).

Lots of tricks like this.
And by using my mobo wires and the -5V wire, I was able to obtain 17V (12+5=17) for overclocked fans.
biggrin.gif

Ovrrclocked fans, it doesn't get anymore hardcore than this!
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post #45 of 45
Or you might like the following idea better: a 17/5V switch.

Plug switch pole 1 to PSU 12V
Plug switch pole 2 to PSU ground
Plug switch middle prong to fan red wire.
Plug fan black wire to your mobo minus5V

So you got 5V for everyday, and 17V overclocked fans when benching.

biggrin.gif

You can get various voltages this way: 5V, 7V, 10V, 12V, and 17V.
Some PSUs will even toletate 24V. But my Enermax PSUs all shut down if I try 24V.
Edited by PepeLapiu - 3/16/14 at 5:15pm
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