Is my new system compatible? Major instability issues

Hello,

I recently built a new computer for gaming and I just wanted it to be kick ass just for fun.

After putting it all together, it hasn't run a single day without crashing and has gotten to the point where it won't run for more than 5 minutes without a crash (Blue screens/random restarts/failed startups). At one point, the power supply went out and wouldn't send the "power good" signal to the mobo. After a simple RMA, the crashes continued (which leaves me to believe that the PSU was a seperate issue).

I took it over to my local computer repair center. He ran some drive checks and came back with the answer that both drives were bad. He had gotten over a million EEC errors in about 5 minutes on the SSD. RMA both of them, the SSD comes back bad as well. According to the OCZ RMA manager, I hit the lottery, because this failure rate is unheard of.

However, finally get two good drives in the system and reinstall my Win 7 Home Pro, and 3 days later, its back to crashing every five minutes. Just like last time it got progressively worse. The first was like 1 crash, then the next was every couple of hours, then every 30 minutes... etc.

I don't get it. Please help.

My system:

-Case-Antec Nine Hundred Black Steel ATX Mid
-PSU-Antec EarthWatts EA750 750W Continuous Power ATX12V
-MOBO-Gigabyte GA-880GA-UD3H AM3 AMD 880G SATA 6gb/s USB 3.0 HDMI ATX AMD
-Processor-AMD Phenom II X6 1090T Black Edition Thuban 3.2GHz AM3 Socket 125W Six-Core (HDT90ZFBGRBOX)
-RAM1-Kingston HyperX Blu 4GB (2 x 2GB) 240-Pin DDR3 SDRAM 1600 (PC3 12800) (KHX1600C9D3B1K2/4GX)
-RAM2-Kingston HyperX Blu 8GB (2 x 4GB) 240-Pin DDR3 SDRAM 1600 (PC3 12800) (KHX1600C9D3K2/8GX)
-SSD-OCZ Agility 2 OCZSSD2-2AGTE60G 2.5" 60GB SATA II MLC
-SSD-The above was replaced with the Agility 3 SATA III drive after the second RMA
-HDD-Seagate Barracuda Green ST1500DL003 1.5TB 5900 RPA SATA 6.0Gb/s 3.5"-Bare Drive


That covers it all. As I stated above, after the 2 RMAs on the OCZ SSD, they sent back an upgrade to the SATA III version of the same drive (which I was pretty excited about). However, now we are back to the same type of crashing issues meaning that when I test these drives, I am willing to bet that they are bad as well. I don't have a seperate computer to do the testing, so i'm going to the repair place today.

Sorry for the long winded explaination, but this a weird one, and I wanted to give you all the details of the history of this build from hell.

Thanks everybody.