(This is my first build, so please bear with me if I'm overdescribing or whatever at times)
I've got an Antec Three Hundred case, and as you might know, you can control the speed of the included fans with a little switch dangling off them.
I've currently got the fans connected to one of the cables coming out of my PSU (Antec Neo Eco 520C, and the sockets to plug into hang off along the cable). At the very end of that cable is a 4 pin plug, which seems to fit into the SYS_FAN2 socket.
However, if I plug it in, the computer won't boot.
Any ideas for why? Or do I even need to bother with this? I mean I'm thinking that as I'm playing games it would definitely be a good idea to let the computer control the fans, which is what I'm guessing the SYS_FAN2 port is for.
-snip, bad reading needs to come back-
wait, what are you trying to plug into that? If you're plugging in a fan into the PSU and the motherboard, that is bad, and don't do that.
[QUOTE=Shadaez;33873312]wait, what are you trying to plug into that? If you're plugging in a fan into the PSU and the motherboard, that is bad, and don't do that.[/QUOTE]
How is that bad, it would make sense for a decent fan to have variable RPM controllable by the motherboard/software while using power from a power supplies molex connectors which nobody uses anymore with the exception of internal accessories.
However that 4 pin connector might be for a separate case fan controller, should probably just leave it unplugged if it solves your problem.
[QUOTE=ripple3000;33873355]How is that bad, it would make sense for a decent fan to have variable RPM controllable by the motherboard/software while using power from a power supplies molex connectors which nobody uses anymore with the exception of internal accessories.
However that 4 pin connector might be for a separate case fan controller, should probably just leave it unplugged if it solves your problem.[/QUOTE]
I guess I don't understand how PWM works, my bad. I still don't see how it could be a good idea, at best it would provide only half power via both sources - which is pointless, so why not just plug it directly into motherboard? I thought PWM fans changed the voltage to control fan speeds, thus the constant 12v from the PSU, with a motherboard fan port putting out < 12v would cause current to flow into the motherboard. Apparently the fan controls the speed, though, and now I do feel dumb. The OP is obviously doing something wrong though, it sounds to me like he's plugging something in where it's not supposed to be (I'm thinking possibly a floppy power into PWM fan he mentions a '4 pin cable from psu that fits into SYS_FAN2'?)
[QUOTE=Shadaez;33873489]I guess I don't understand how PWM works, my bad. I still don't see how it could be a good idea, at best it would provide only half power via both sources - which is pointless, so why not just plug it directly into motherboard? I thought PWM fans changed the voltage to control fan speeds, thus the constant 12v from the PSU, with a motherboard fan port putting out < 12v would cause current to flow into the motherboard. Apparently the fan controls the speed, though, and now I do feel dumb. The OP is obviously doing something wrong though, it sounds to me like he's plugging something in where it's not supposed to be (I'm thinking possibly a floppy power into PWM fan he mentions a '4 pin cable from psu that fits into SYS_FAN2'?)[/QUOTE]
Must be a really amazing fan, or it just runs off molex and has capability to use a case mounted fan controller?
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