EggXpert

Hum. So I decided to run a stress test on the Radeon 5870. As soon as the test starts, a weird crackling noise comes out of the PSU. Eventually the whole computer shuts off in mid test. I took video/audio of the crackling. What do you think of the noise in the video? This is a brand new computer build.

EDIT: This is a modular PSU. I took it out of the case and reconnected all the pieces. I think of the cables was not connected great. Now the computer does NOT turn off, but I still get the odd crackling sound.

http://www.solvetechnology.com/temp/MVI_1740.AVI

Below are the specs on the system I built.
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Gigabyte GA-MA790FXT-UD5P Bios revision f7 (latest version)
AMD Phenom II x4 965 BE at 200x17 and 1.425 voltage (all default)
Cooler Master V8
OCZ OCZ3BE1600C8LV4GK Black Edition DDr3 1600 2x2gb at 8-8-8-24 voltage 1.65 (factory settings. Had to manually set in bios)
Cooler Master HAF 932
Ultra X3 850 Watt psu
Windows 7 64 Bit RC
3 x 750 gb Samsung SATA HD

That crackling sound is more than likely ARCHING!!!!!!!!  that means electricity is jumping from one point to another in side the PSU.

DO NOT USE THAT PSU ANYMORE OR YOU RISK DAMAGING ALL YOUR EQUIPTMENT ............ RMA IT IMMEDIATELY!!!!!!

(RMA = send it back to newegg or the manufacturer as defective)

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Probalby more of bad bearings in the fan. This may be causing the fan not to speed up enough to cool the power supply resulting in the OTP (over temp protection) to kick in.

When one of the balls in the ball bearing runs out of the race, or there was not one there to begin with, it may bang around and make this crackling sound. 

If it was arcing, this psu would have fried, or tripped the SCP (short circuit protection) 

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Delta is my 1st choice in power supplies
Biostar Tpower N750 (all UCC solid caps) 5000+ dual core PNY 9800gt 4gb OZC DDR2-800 320gb WDC 700W Delta DPS-700

Considering that the PC is shutting down because of it I'd assume that the SCP IS tripping, lol.

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