x58 USB3 Phase LED and buzz

[Pablo 54]

GB x58 USBB3
i7 950 with a Cooler Master Hyper 212 Plus
G.SKILL PI Series 12GB 1600
Mushkin Enhanced Callisto Deluxe 90GB SSD with Win7 Home Premium 64bit
One WD 2 TB Caviar Green
One WD Velociraptor
MSI 470 GTX
Rosewill Firewire Adaptor (PCI Express)
MSI Wireless card (PCI Express)
PSU: Ultra 4x 1050
Bios Version F2 & Board Version 1.0
Board set at Turbo with Memory running in Profile 1 (XMP)

Built this about 3 weeks ago.  Everything is running fine but  I have a nagging issue that I have yet to get an acceptable answer for:
After a cold boot, the Phase LED's will come on for about five seconds.  Going from top to bottom they show as 2 Red, 2 Yellow and 2 Green.  From what I can find (Manual says nothing) they have something to do with the fact that I am running my memory at 1600 - essentially overclocked.  After the POST beep, there is a 2 second buzz that sounds as well. None of this happens on a simple reset.   

I am planning on putting in a second 470 in SLI but I am worried I am pulling too much juice in the system too fast.
Adjustments I have done with no effect:  Set QPI/vTT to Normal (locking it at 1.25) Now runs Auto at 1.45.  Set CPU voltage to Normal then back to Auto

BTW:  This is my first Gigabyte MOBO ever-I actually won it in a F@H contest.  My builds have been about  80% ASUS, 10% Intel and 10% XFX.  Easier setup than my old Pro-Turbo and less tweaking than my 680i.  The placement of the PCI and the #2 PCI Express x16 are not the best but that is specific to my setup.  I will definitely be buying a GB board for my next build.

[Dark Mantis]

Hi and welcome to the Gigabyte Forum.

What you are describing is perfectly normal and is part of the POST process when doing a cold boot. My board GA-X58A-UD7 lights up like a Christmas tree. I am not too sure what is causing the buzz but it is possibly a fan that comes on at full speed for a couple of seconds before adjusting to what it is meant to be running at.

[Pablo 54]

Thanks for the information.  I feel a little bit better.  I was worried I might see a plume of smoke one day.  The buzz is coming from the speaker on the board so I am a little confused by that.  Not a standard POST sound I am used to.

Thank you again.

[Dark Mantis]

Chances are then that it is picking up some extraneous electrical noise from the other cables or even the mains if it is at about 50cps.