Rad 4-pin fans to RP-980Bk 3-pin or to mobo's 4-pin

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camivill
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Rad 4-pin fans to RP-980Bk 3-pin or to mobo's 4-pin

Postby camivill » Thu Aug 16, 2012 10:05 pm

I have a RP-980BK with a rad HX-CU1020V.
I am using Coolermaster Xtraflo fans red color which have speed of 800 - 2200 R.P.M ± 10%(PWM).

The Rp-980BK has 3 pin connectors. The Fans have 4 pin connectors.
I used a cable to connect them to the RP-980BK but i see 2 problems:
1. The cable is split into 2 fans. From these, one has LED on not moving and the other one moves.
2. The speed of the fams is not as good as if they are connected to a 4 pin connector directly to the MOBO.

Questions are:
1. Is it better to connect the rad fans directly to the Mobo, as they will use the 4th pin that the RP-980BL doesn't have?
2. As there are only 3 4-pin connections in the mobo ( one is used by the CPU fan which is in use) and only 2 are left ( CHA_FAN1 and PWR) which one will be better to use? I realized PWR fan has more speed than the other Mobo fan connections
3. By splittling one 4-pin connection into 3 fans, this will change any speed or will cause any damage to eitehr the fans or the mobo?

Thanks.

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Re: Rad 4-pin fans to RP-980Bk 3-pin or to mobo's 4-pin

Postby Izerous » Mon Aug 20, 2012 9:59 am

You can use the same header for all 3 fans from the motherboard depending on the amperage draw as motherboard headers are only capable of of a certain amperage and overdrawing that may damage the motherboard. Example the TK-123 fans I was playing with even have a warning sticker to not connect more than one to a single motherboard header.
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camivill
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Re: Rad 4-pin fans to RP-980Bk 3-pin or to mobo's 4-pin

Postby camivill » Mon Aug 20, 2012 11:04 pm

I am using a splitter, but they are connected to the RP-980Bk. it only has 2 connections. the thing is that the Mobo has 3 4-pin connections that i can use for the 3 fans. At this point by connecting them to the RP-980Bk they are not using the whole power and the liquid is coming back still warm after passing the radiator.

The thing is that i dont know what i am doing wrong here but the 3 fans have their red leds on, but only 2 are rotating.

So i am going to buy cables to connect each other indenpendently. But I didn't have this issue before. So now that i am trying to sort out if connect 3 fans 4-pin to the motherboard SABERTOOTH x58 direclty or use the 2 3-pin connections from RP-980BK and then split one for 2 fans.

I mean is really good to use the 4th pin of the fan ?

ASUS motherboard uses the speed fans to be adjusted based on temperature, so it should be good...
Thanks guys.

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Re: Rad 4-pin fans to RP-980Bk 3-pin or to mobo's 4-pin

Postby Fluxc0re » Wed Feb 20, 2013 4:59 pm

He did not realy hook up all those fans to his motherboard did he ?
That is such a bad idea . I know there are points on a motherboard for them but ....Dammmm Thats got to make the VRM's get Hot .
mabe his motherboard burnt up and thats why he hasent posted for a bit ;p
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