Computer Power Failure. Opinion Appreciated

[RobertoMayo]

Hello,
I recently bought a new hard drive for my computer, and I have been having trouble with the power (turning off randomly, not turning on) whenever the hard drive is installed (I think). I would like to ask you guys to confirm this, and please suggest what wattage I need it to run it and a CD drive. Thank you.

Current Power Supply: Logisys 550w


Operating System:
MS Windows 7 Ultimate 64-bit
CPU:
AMD Phenom II X4 945 36 °C
Deneb 45nm Technology
RAM:
8.00 GB Dual-Channel DDR3 @ 666MHz (9-9-9-24)
Motherboard:
BIOSTAR Group A770E3 (CPU 1) 34 °C
Graphics:
HZ201D (1600x900@60Hz)
AMD Radeon HD 6700 Series (ASUStek Computer Inc)
Hard Drives:
233GB Seagate ST3250820AS ATA Device (SATA) 32 °C
Optical Drives:
No optical disk drives detected
Audio:
Realtek High Definition Audio


New Hard Drive:
Western Digital Caviar Black 1 TB SATA III 7200 RPM 64 MB Cache Internal Desktop Hard Drive Bulk/OEM - WD1002FAEX

 

[p4nz3rm4d]

prob a psu issue, but i always reccomend a complete rebuild of ur pc, and reinstalling windows... try the connections of the hard drive.

 

[RobertoMayo]

I have unplugged most of everything and plugged it back in, but that didn't do anything :/

 

[p4nz3rm4d]

oh... then i suggest running a few tests. run furmark, prime95, and make notes on temps. if that causes problems during testing, then you have found your problem. but if not, get a new hard drive!