|That is a decent brand and size PSU. The problem is the 4 12V rails are all rated at 18A each. It is possible to overload one or more of those rails while not using one at all. |
The trend is to return to single 12V rail with enough amps for everything. I notice that newegg.com has your PSU on sale right now. the reason is what I just stated.
It is possible to use that type of PSU safely if you load the rails evenly. One rail is used for the CPU connector. Two others have PCIe connectors and the last one is for drives, etc.
If your graphics card draws more than 18A then you can't use that PSU at all.
Your graphics card pulls 186watts under power. That comes out to 15.5A @12V. If you are overclocking or that model is hopped up you may be exceeding the 18A available.
Best to replace with a single rail PSU is you can. You present PSU should still be under warranty so you will need to deal with that too.
PSUs will fail faster when running hotter too. If you look at the specs they mention temperatures. The efficiency falls off when hotter.