Hey guys, I'm having quite a problem here and could use some new ideas. I have had the desktop listed on my avatar for nearly 3 years: -C2D e7200; -P5Q-Pro motherboard (no modded bios); -2x2gb DDR2; -ATI 4850; -A single SATA2 hard-drive; -a couple of 120mm fans. All this powered up by a Corsair TX-650W. Some 9 months ago my Western Digital hard-drive (5000AAKS) suddenly died- clicking noise, not recognized in the bios. Never had any issues reported by SMART. I RMA'd it and got a new WD drive- same model (5000AAKS). Installed it but few weeks later it started reporting problematic sectors (according to SMART). Also the red light showing disk activity would turn on and stay like that for minutes, stopping me from accessing the drive. Obviously, it was also botched up. So I sent that 2nd drive on its way to WD and a couple of days ago got my replacement- same 500gb model. Installed the drive, put Windows 7 on it and all my other software and today... it's reporting problematic sectors in SMART and the activity light is constantly blinking I gotta say... I'm a little lost here, and very annoyed by this mystery. Seems to me that the problem is one of these three: -WD keeps sending me defective/low quality drives(getting 3 bad drives in a row? What's the chance of that?) ; -the motherboard is defective; -the power supply is defective. Any ideas or suggestions? Thanks a lot!