Update:
The PC ran fine with the new power supply up until yesterday. I was in the middle of transferring files to my secondary drive from my external when my roommate tripped the breaker and we lost power. I started it back up, and whenever i tried to multitask (move files and use the internet) the PC would lock up. on restarts, half the time it wouldnt recognize the second SATA drive. it got to the point where the BIOS wouldn't even read that there was a connection. this morning as i was going into the BIOS, i noticed that the POST screen is reading my CPU speed at only 2.00ghz, and my ram at 667mhz, where before it was at 800+, and its still not reading my hard drive.
so, does it sound like my motherboard is the problem?