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High pitched noise, help please

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September 23, 2011 5:53:54 PM

New build, hearing a loud, high pitched, variable sound at the top of the MOBO near the CPU and the top MOBO heat sink. The 4 blue MOBO led's are also blinking and dimming/brightening in sync with change in the sound's volume.

The sound doesn't emmit until the windows loading screen appears. I've turned the computer on without the HDMI cable or USB mouse/keyboard and I don't hear the sound, though I confirm windows loaded successfully. When I plug the mouse/keyboard in the sound starts but is very quiet. When I plug the HDMI into the video card without the tv turned on the sound and light flashing increase in intensity. When I then turn the tv on the sound is loudest. The sound is far from the MOBO speaker. I think the CPU temps and voltage are ok, they are around 55 degrees celcius and 1.00 volt.

All parts are purchased from newegg.





Intel Core i5-2500 Sandy Bridge 3.3GHz (3.7GHz Turbo Boost) LGA 1155 95W Quad-Core

XIGMATEK LOKI SD963 92mm HYPRO Bearing CPU Cooler bracket included I7 i5 775 1155 AMD and dual fan push pull compatible





Rosewill BLACKHAWK Gaming ATX Mid Tower Computer Case

MSI P67A-G43 (B3) LGA 1155 Intel P67 SATA 6Gb/s USB 3.0 ATX Intel Motherboard

MSI R6950 Twin Frozr III PE/OC Radeon HD 6950 2GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card x2

G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model F3-10666CL7D-8GBXH

Western Digital Caviar Black WD7501AALS 750GB 7200 RPM SATA 3.0Gb/s 3.5" Hard Drive -Bare Drive

Seasonic SS-850HT 850W ATX12V v2.31,EPS12V v2.92 80Plus Silver Certified, Active PFC Power Supply - OEM

LG CD/DVD Burner Black SATA Model GH22NS70 OEM - OEM

Microsoft Windows 7 Home Premium SP1 64-bit - OEM

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September 23, 2011 6:21:46 PM

I think your are not giving enough power to your CPU, stock voltage should be around 1,12V~1,22V (not sure, I'll have to check). However, your mobo manual should tell you the kind of error you're getting (it is coded with those LED's blinking)
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September 23, 2011 6:36:49 PM

Nope, CPU voltage seems to be normal. 0.95V when idle, 1.27 when loaded. So I'm guessing it's a mouse/keyboard drivers problem. Try connecting both devices on different usb ports, and reinstall the latest drivers.
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September 23, 2011 6:56:19 PM

BlackHawk91 said:
I think your are not giving enough power to your CPU, stock voltage should be around 1,12V~1,22V (not sure, I'll have to check). However, your mobo manual should tell you the kind of error you're getting (it is coded with those LED's blinking)





I increased the CPU voltage from auto to 1,22V and the sound is gone! Thank you very much.
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September 23, 2011 7:03:34 PM

Best answer selected by toskaboska.
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November 2, 2011 1:24:19 AM

**UPDATE**

After flashing my MOBO BIOS the "auto" voltage setting for the CPU Vcore now sets an adequate voltage which doesn't produce a high pitched sound.
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