You're pretty good at selecting your components.
I looked up your PSU and it's made by Seasonic which I found to be the best (along with Super Flower) and I like Gigabyte mobos. I have a Seasonic PSU and a Gigabyte mobo myself. What make is your memory? Mine's Corsair Vengeance. I just upgraded from an i3-2105 to an i5-3570.
some folks here helped me select parts a few years ago when i built it as my first PC. Now i am waiting to have the funds to build another. I also have corsair memory 4gb/
As you are thinking of selling the computer, Suggest you have a look at the voltage put out by the PSU to make sure it is within specs. It is possible that low voltage has, over an extended time, damaged the GPUs.
Download HWMonitor, run and upload some screenshots.
Edited by techgeniuswong, 13 October 2013 - 07:39 PM.