• Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
    Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.

Problem: external power supply for fan

J

Jon8RFC

Weaksauce
Joined
Aug 5, 2004
Messages
83
I put my brother-in-law in a difficult situation. I had him buy the following two products:
http://www.newegg.com/Product/Product.aspx?Item=N82E16835209005
http://knightdiscounts.com/estore/4pin-molex-external-power-supply-p-1886.html

I didn't read the description (PEBKAC, I know...I was hunting for the least expensive supply, plus shipping/tax) and he said the fan will not spin up as a result of pin 2. All this will be used for is powering that fan to cool the rack of an entertainment center--it will never power anything else like a hard drive. Can I simply swap pins 2 and 3 on a short molex extension and send that to him to use as an inline adapter? Pin 3 has to be grounded for a hard drive to work (right?) so I can just swap them for a fan-only use, correct?
 
pin 1 should be 12+ (Yellow)

pin #2 should be ground (black)

pin #3 should be ground (black)

pin #4 should be 5+ (red)

Normaly 2 and 3 share a common ground. Your PSU states #2 is ungrounded, so, no 12v for the fan.

You could move the #2 wire on the fan plug to #3 for your ground, or you could jumper #2 and #3 on the fan Molex to obtain your needed ground..

Not being able to see inside the PSU please double check with a mulit meter before you make changes. As it stands you should see NO continuity between 2 and 3 on your PSU which should confirm your #2 is not grounded.

http://www.helpwithpcs.com/courses/power-supply-basics-inc-pinouts.htm

A little care, pin numbering between companies is not always equal.
 
Thanks, Bill. I don't have access to it (he and I are in different states), but your thoughts on jumpering #2 to #3 are what I had.

Yeah, I'll take into account the chance of a different vendor using their own standards, but the principle theory is what I'm targeting. =]
 
You must log in or register to reply here.
Back
Top