Hard drive beeps on start up occasionally

[BigFeet13]

Occasionally on boot my sata drive will slowly beep a number of times before it gets to the splash screen. It's definitely the hdd (the mobo doesn't have a speaker), and it's not the first one to do it on this PC. It passes SMART, and I've run a surface scan and an extended self test using hard drive sentinal. No issues. Any ideas?

Athlon II x4 635
ASUS M4A78LT-M
Samsung HM250HI 250gb hdd (2.5" laptop drive)
EVGA gtx460se
600 Watt Diablotek PSU

 

[smorizio]

ssd has no moving parts. older hard drive have spindles that can beep when there going to be a drive failure. if the drive is beeping it may be do to bad power. the unit you have is tier 4/5 unit that is known to blow up and catch fire.
http://www.hardocp.com/article/2010/12/17/diablotek_phd650_650w_power_supply_review/1#.Vq2jgrHOXHY

 

[BigFeet13]

Thanks. That is a different model, but PSU was my first thought. I haven't had issues with other hardware, but I know the PSU isn't top quality, to say the least. It is 7 years old now, and has worked fine. I've been suspecting the graphics card just pulls too many amps. Unfortunately, I can't swing a quality PSU right now. Fortunately, it's not my main PC.

I'll mark it solved if I don't hear any other opinions in the next day. Thanks again.