Hello,

I have a very big problem. I bought a lot of expensive parts, put it all together, and now I get a loud squealing sound coming from the motherboard/cpu area when I press the power button. The computer does not boot. It powers on, all fans start to rotate, I hear the hard drives, but nothing else happens but this loud annoying squealing sound.

I have the following hardware:

ASUS Striker II Formula LGA 775 NVIDIA nForce 780i SLI ATX Intel Motherboard

Intel Core 2 Extreme QX9650 Yorkfield 3.0GHz LGA 775 130W Quad-Core Processor

CORSAIR Dominator 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory

2 Western Digital Raptor X WD1500AHFD 150GB 10,000 RPM SATA 1.5Gb/s Hard Drives

2 EVGA 768-P2-N835-AR GeForce 8800GTX 768MB 384-bit GDDR3 PCI Express x16 HDCP Ready SLI Supported Video Cards

COOLER MASTER Stacker 830 Aluminum ATX Full Tower Computer Case W/ Real Power Pro 1000W Power Supply

I am clueless as to what I am supposed to do. I built at least a dozen custom computers before and never did I come across a problem like this.

I called a local computer tech, and he was also clueless on my problem.

ASUS support is useless and told me to check if I plugged in the power cable to the power supply.

If anyone knows anything about this issue, please reply...

First off simplify.

If you placed the SLi bridge then remove it.

Start with one stick of RAM.

Connect no other drives nor devices.

If the motherboard had a molex PCI_E power connection: Do Not use it. It might have been labeled Auxiliary.

Does not that mobo have an LCD error display?

If not if you could be more precise in the "loud squealing sound" it would help.

Nothing in there makes such sounds outside of fans or very bad hard drives.

If you are hearing a BIOS beep this is a different story.

You should be able to tell if you are hearing a mechanical friction or an audio display.

I will simplify the system and try it again. The squealing sound does not seem like a bios post beeps. I know what those sound like. This squealing sound is like an alert that something is extremely wrong. It sounds exactly like nails on a blackboard continuously. The sound is coming from the cpu/motherboard area. I know for a fact that it isn't the motherboard problem cause I already went through 3 replacements of the motherboard.

Can it be the cpu? What happens when the cpu is faulty or dead? I never encountered a dead cpu problem.

OR

Can it be the power supply unit... as that is the next closest thing to the cpu/motherboard and might be coming from there...

Thanks a lot for your reply!

What happens with a dead CPU is nothing. Fans will run. That's about it.

Your PSU theory makes the most sense.

Check the fans.

Does that PSU have an error read out on it?

No error read out. I'm pretty sure now that it might be the power supply.

Thanks for your help. I'll update when I try a new power supply unit.

For a 1,000 Watt I'd suggest this:

http://www.enermaxusa.com/catalog/pr...roducts_id=115

I have used these and have been totally satisfied.

I was going to pick something up locally. I don't want to order and wait any longer to get this monster running.

Which of the power supply units on the following link would you pick out as the best?... in my hardware requirement specifications.

http://www.jr.com/JRSectionView.proc...27317&Ne=10000

I'm looking at all the psu's over $200 with at least 1000W of power.

Personally I only use Enermax or Thermaltake.

Both are top shelf in my opinion.

The only 1000W in your shopping is this Thermaltake:

http://www.jr.com/JRProductPage.process?Product=4172331

However you should consider if your current PSU is new then either a replacement or RMA might be in order.

So I bought a new power supply unit and connected it. Same squealing noise. Then I started taking **** out and booting the machine. As I took the first video card out, the squealing got twice as low. I took out the 2nd video card, the squealing stopped completely.

Any suggestions on why the heck these $550 dollar video cards are squealing like slaughtered pigs?

Strange.

So if you use either card in the top slot you get this noise?

You were using the top and bottom slots? Not the middle?

Do you have the proper power connections to the cards?

I have two 8800GTX DDR2 and they each have two 6 pin ports.

Yours would either have the same or perhaps a 6 pin plus an 8 pin.