I think the problem is with your power supply. Firstly, I have never heard of Aerocool and you would be better off with a reliable brand such as Corsair.
Also your graphics card needs a minimum of 30A on the 12V rail that your GPU is connected to. Your PSU according to this website ( http://www.aerocool.com.tw/joomla/index.php/products/power-supply/38-eco-friendly-series/43-e85-550
) doesn't have a 30A rating on any of the 12V rails.
Therefore, even if your power supply is working properly, it isn't supplying enough amps to your GPU, and if you go with a brand like Aerocool the PSU itself may not be giving you quality power. I'm about 90% sure that that is your problem.
Hope this helps,