I've ran out of options and seek tech helkp from the tribe of FFXIV peo

[Mordred_Kishi]

If you have not already, check your power supply. Over time, those draw power ineffectively and distribute it inefficiently to the CPU and video card. Often people think something is wrong with their video card when the problem is with a slowly-failing power supply (which is a much cheaper remedy).

If you were overclocking your video card previously, overclocking can damage the power supply and shorten its lifespan, especially if it were already barely high enough capacity. (Some people disbelieve that overclocking a video card can damage a PSU. They are wrong.)

If you do not know how to check it yourself, take the PC to a highly-rated PC repair place nearby. They can check the power supply and other components to figure out what is wrong. Diagnosis of problems usually costs about $75-100.

The pc is brand new, built it myself a month ago. The power supply is a very good 850W PSU, which is more than enough to handle the transient spikes a gpu throws at it. Also, overclocking your system does not damage your power supply, whomever told you that it does is either horribly wrong, or you misunderstood. The ONLY time it would is if your power supply is either really cheap, or very low end and does not have enough rails to support a proper load. Good quality power supplies have so many fail safes in place that even overloading it and causing undercurrent or another protection to kick in wont damage it.