CPU OPT header ?

Jamin280672 · 17 May 2014 at 07:44

Just brought a new laing DDC pump, the 900lph version, I think it's 18 or 20w as my other one which is the 400lph version seems to be dying after about 5 years of service, however, the new pump comes with a 3 pin fan connector, whereas the old one came with a Molex connector.

My question is, do I connect the pump to the cpu opt header and can a motherboard header handle that sort of wattage, or do I use a different header ? Like a system fan header ?

Or do I just remove the two power cables from the 3 pin connector and wire them up to a Molex and run direct from the PSU ?

I want the pump running full speed anyway, so I don't need the ability to speed adjust it, would be nice to monitor the speed though which I can do by leave one wire connected to 3 pin fan plug and plug into any hearder on the motherboard, whilst getting it's power via a Molex from the PSU.

The motherboard by the way is a Gigabyte G1 sniper 5.

Thanks in advance.

khemist · 17 May 2014 at 08:17

I've got my ddc (Koolance pmp400) running from the opt just fine, been running it for around six months, i like to control the speed through software.

Jamin280672 · 17 May 2014 at 08:56

khemist said:
I've got my ddc (Koolance pmp400) running from the opt just fine, been running it for around six months, i like to control the speed through software.

Is that the 400lph version, if so, it's only 10watts, not sure if the header can handle 18w, by statndard they used to be 1amp which is roughly 12 watts, but that's going back a bit and not sure if they can handle more now a days, got a funny feeling some of them are now 2amps.

OLDPHART · 17 May 2014 at 13:01

Power pump from the PSU and connect signal connector to CPU Header, why do you want the Pump to run at full tilt.

When you can set it to run at a lower speed and still do the job plus the pump will make less noise as well.

Jamin280672 · 17 May 2014 at 13:55

The pump came with a 3 pin fan connector on it only, no Molex, I've since been to maplins and brought a Molex connector, I've removed the yellow and black wire from the 3 pin and wired them up to the Molex instead, I thought laing pumps came like this anyway.

Wanted the pump at full speed = higher pressure inside the block through the jet plate.

The pump.shouldn't really make any noise, I've put it on a bracket and the bracket on vibration dampening.