Help, CPU Fan starts, then stops

[Riverhound777]

My old MOBO died on me so I got a new DFI Lan party NF4 SLI-DR Expert to replace it. I put everything in and when I turn it on, the CPU fan starts up fine, but then stops about 5 seconds later. The system continues to boot and even starts going into windows without any beeps or errors. I shut it off myself after that since I really don't want to toast my CPU. I have it plugged into the CPU fan plug on the board, and have checked that it is tight.

Any Ideas? Here is my setup

Enermax Noisetaker 420W PS
AMD 64 3200+
Asus X800XL Vid Card
2x 512mb Corsair Value Select DDR400

 

[Matthias99]

Does it stay on when you're in the BIOS screen? What is the CPU temperature doing?

Does this MB have temperature-controlled fans?

 

[Riverhound777]

My bad, it shuts off the cpu fan when the temp is less than 25C. I've never had a mobo do that before.

 

[GalvanizedYankee]

Only from what I have read...Many of the DFI LP boards NEED 3+A on the +5VSB rail.
So do report back what the wattage is for the VSB rail.

DFI-Street is no more but there is http://global.dficlub.com/

 

[Riverhound777]

Ok, well I think I am really lucky to even get my comp to run after reading some of that website you linked to. I think my Power supply is very much on the low end. They recommend this on that site:

DFI boards require a native 24 pin 480w PSU Minimum of +12V@26A for Single Video Card Systems & +12V@34A for Dual Video Card (SLI) Systems.

Mine has +12V@15A. and It only has the 4 pin connector(the book said it would work for a single card, so I didn't think much of it). My PS also only does +5VSB@2.5A.

They also say the DFI and especially the Expert board are really picky about quality parts.

Amazingly I had no issues last night besides the CPU fan scare. My system booted up just fine(on the old O/S install I might add). I installed the new drivers and even played Eve-Online for an hour or so. I monitored the CPU temp the whole time and it never went past 28C. I didn't really like having the CPU fan turn on and off all the time though, was really distracting.

Should I look into getting an upgraded PSU?