Replacing psu fan.

David41 · 31 Aug 2009 at 13:34

Anyone ever did this, the fan on my ocz 780w modxstream is really starting to annoy me, was considering getting a new psu but I was advised against doing this because it is in perfect working order.

Schizo · 31 Aug 2009 at 13:40

if you have the same size fan then i think it would be possible.

but a word of warning....ive seen a article about psu's and the power they keep once it has been turned of and they say if you are going to work on a psu you must leave it unplugged for a week to discharge all the power as they can be very dangerous.

David41 · 31 Aug 2009 at 13:45

Lol, I wouldn't last that long without my pc. Might just have to put up with it, oh well.

Oh by the way, I currently have the psu fan facing the roof of the case in my antec 300. I've heard of people turning the psu so that the fan faces the bottom, is this possible with this psu and case?

Namak · 31 Aug 2009 at 13:53

schizo220168 said:
if you have the same size fan then i think it would be possible.

but a word of warning....ive seen a article about psu's and the power they keep once it has been turned of and they say if you are going to work on a psu you must leave it unplugged for a week to discharge all the power as they can be very dangerous.

For a week??? Are you sure about that? I would like to see that article if you could find it again as it seems instinctively wrong to me. I could maybe buy into the fact that capicitors could hold charge for 24 hours but a week seems insane.

Even after a couple of hours I would have thought there could be little chance of it still holding a dangerous charge.

(PS this post is not based on any evidence so please don't go sticking your fingers in possibly dangerous PSUs without professional advice

)

Lumeycom · 31 Aug 2009 at 14:02

24 hours should be fine to discharge the caps in a psu, a week is nuts!

Amonlym · 31 Aug 2009 at 14:04

make sure you check the working voltage of the existing fan, and get a new fan rated to the same voltage (there are a few 5v psu fans kicking about, for example) and the same or higher airflow. - avoid less airflow as you might end up cooking the psu

David41 · 31 Aug 2009 at 14:37

Thanks for the advice, I'll have a look on the ocz website and see if I can find the working voltage, plus the airflow.

mtb_kng · 31 Aug 2009 at 14:56

Just put your fingers on the caps and that will discharge them

Schizo · 31 Aug 2009 at 15:05

Namak said:
For a week??? Are you sure about that? I would like to see that article if you could find it again as it seems instinctively wrong to me. I could maybe buy into the fact that capicitors could hold charge for 24 hours but a week seems insane.

Even after a couple of hours I would have thought there could be little chance of it still holding a dangerous charge.

(PS this post is not based on any evidence so please don't go sticking your fingers in possibly dangerous PSUs without professional advice )

ill dig the mag out and show you.

Namak · 31 Aug 2009 at 15:13

thanks

Happy · 31 Aug 2009 at 15:17

It's easy, just be careful when inside the PSU, and remember it voids your warranty.

jellybeard999 · 31 Aug 2009 at 15:20

Happy said:
It's easy, just be careful when inside the PSU, and remember it voids your warranty.

Turn it off at the wall, power PC up again to discharge it a bit, take out of PC and then work on it straight away, so long as your careful. You'll either have to splice into the PSU fan connector/wire or if you're very lucky it'll have a 3 pin connector inside.

binaryknight · 31 Aug 2009 at 15:26

Happy said:
It's easy, just be careful when inside the PSU, and remember it voids your warranty.

jellybeard999 said:
Turn it off at the wall, power PC up again to discharge it a bit, take out of PC and then work on it straight away, so long as your careful. You'll either have to splice into the PSU fan connector/wire or if you're very lucky it'll have a 3 pin connector inside.

sound advice there basically what i did to replace a noisy fan and worked a charm, then i got more confident and adjusted the 5v rail with the psu open turned on and watched the volts via the bios and digidoc to get solid 5v rails... ah the days of sparkle and the adjustable pots inside the psu

Tuvoc · 31 Aug 2009 at 16:08

I've replaced the fan on a PSU before, had to splice the cables as it used a different connector, but the procedure went smoothly and noise from the PSU was dramatically reduced. Just be careful as people have said, don't touch any components inside the PSU and leave for at least 24 hrs before doing it