Cable Forum - View Single Post

zoombini · 16-03-2004, 12:38

The 5 v line is 5v above 0v, so if you use the Red 5v line as the fan 0v and the Yellow 12v line as the fan 12v, you then get the 12v minus 5v which = 7v.

As both are capable of supplying enough current to to this there should be no PSU problems, however, the fan is then running at the minimum if not under it rated usable voltages & this may reduce its lifespan.

Also, the amount of airflow that the fan passes will be reduced as it is operating at a slower speed.

But what the heck, if it works & does the job then go for it.

16-03-2004, 12:38	#5
zoombini cf.mega poster Join Date: Jun 2003 Location: England Services: I no longer receive cable services, I blame the inept accounts dept for that. Posts: 3,732	Re: Power supply plugs The 5 v line is 5v above 0v, so if you use the Red 5v line as the fan 0v and the Yellow 12v line as the fan 12v, you then get the 12v minus 5v which = 7v. As both are capable of supplying enough current to to this there should be no PSU problems, however, the fan is then running at the minimum if not under it rated usable voltages & this may reduce its lifespan. Also, the amount of airflow that the fan passes will be reduced as it is operating at a slower speed. But what the heck, if it works & does the job then go for it. __________________ Not really visiting CF much these days.... If you need me, PM me.