7v Mod - How many fans?

Soldato
Joined
19 Jan 2006
Posts
4,250
Hi everyone,

I plan on adding a DPDT switch to my rig to switch my fans from 12v to 7v.

What I'm questioning is how many fans I could safely run off the 7v? Running purely off the 12v is not an issue, I know I can safely run 10+ fans at 12v off a single 12v rail.

To get 7v you run the 12v line and the -5v line to the fan but as I understand it you don't want to be pulling too many amps this way, is there a general rule of thumb as to how many fans / how many amps you can pull off the 7v line?

Thanks,
Jonny
 
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