PSU Question

[BrianB]

I am moving all my wc to an external cabinet holding 4x 350 passive reservoirs. There will be 4x 80mm Silenx pulling cold air in and 2x 120 mm pushing out. I want to use a separate psu to power the fans. If they are the only load on the psu, will the psu run? I will be bridging the green switch wire to ground - do I need to do anything else? *Edit Also, If I want to use the main pc to switch on the remote psu, can I just connect green to green and black to black?

 

[standin wave]

I thought it was usual to fire up your WC or phase change before powering the PC, so you don't fry anything. Won't your suggestion bring them on together?

sw

 

[BrianB]

Wc is for hard drives x3, and GPU pelt - 2 separate circuits - just need to know if PSU will run on very low load, with only the green/black bridged.

 

[Barkerd]

I thought it was usual to fire up your WC or phase change before powering the PC, so you don't fry anything. Won't your suggestion bring them on together?

sw

If ur watercooling pump is connected up to something like a Criticool relay card then the pump starts up when the PC turns on without any overheating problems - at least it does for me. By the time the BIOS screen comes up everything is flowing nicely

 

[[O-CuK]Marci]

If they are the only load on the psu, will the psu run?

It will run fine, but depends on the PSU as to how long... some don't like just having a load on the 12v and require balancing out... nice and easy... rewire a 4pin molex fan so that red and black from fan go to red and black on molex, then that single fan will use 5v, and connect that on. That puts a load on both rails and keep the PSU happier. Whatever you do, don't attach a 7v'd fan to a standalone PSU with no other load... it generally causes it to trip out immediately.

You can either short green to black on just that PSU to force it to be always on, or splice one psu's green and black onto the other psu's green and black, then once PC is on everything will be on.

Swiftech Rev1 relay would be ideal to run the pump triggered from the 2nd PSU... s'a non PCI-Based relay...

 

[BrianB]

I think I will connect the fans via molex and a Vantec fan controller. In addition, I will install the two new C-Systems Mark II pumps in the external enclosure, and this should keep enough load on the PSU to keep it happy. I think a simple bridge from the main PSU should be enough without having to get the relay card. Are there any other pins on the main ATX motherboard plug that need to be connected or bridged?