CPU fan / booting up problems

[impudence]

I am having a strange problem which I am hoping someone here can help me figure out. I just built a new PC with the following specs. Intel Q6600, Gigabyte p35-ds4, 2gb G skill pc6800, nvidia 8800GTS, and a sunbeamtech NUUO power supply. The problem is this when I hit the power button I get a one second squealing noise which I believe to be the CPU fan warning. After hitting the power button everything but the CPU fan starts. About 3-4 seconds later I get the motherboard post beep (just one beep) and the CPU fan starts turning. When running I go into one of my pc health monitoring tools and they show my CPU fan is spinning at about 800RPM which is clearly way too slow. However, the idle temp never goes above 39c and under load I never get above 45c. I can't figure out what is going on here.

One additional piece of information is that when I first put the machine together it wouldn't post at all when I only used the 20+4 pin main power connector. To get it to post I had to plug in the 4 pin eps12v. It is my understanding that a q6600 should not require the EPS12v to run.

So I have no idea what is going on here beyond a sneaking suspicion that my power supply is bad and not supply enough power. Any ideas?

 

[seemingly random]

Originally posted by: impudence
Any ideas?

Only the same as you. wattage? Does the psu work elsewhere? Does another psu work?

 

[impudence]

It is a 550w PSU. I don't have another PSU to try out at the moment. I should also add that another problem has popped up which is that the fan warning squeal keeps squawking at me. Just half a second long every few hours.

 

[seemingly random]

Is the 6pin power cable attached to the 8800gts? Make sure all power connectors on the mb are filled. Some mb's have an additional 4pin molex (like the power connector on ide drives) that should also be filled.

A useful trick I learned on these forums is to use a piece of paper in the form of a reverse megaphone to isolate sounds in the pc.