Question GPU instantly crashes to a black screen under load ?

[NagaTrinity]

I've seen a few posts on here about GPU's randomly black screening when under load, however the rest of them describe GPU fans going to 100%. My GPU is mostly stable under a medium load, (most games) but will instantly crash under a full load (Furmark). I have updated my drivers, and verified the integrity of the GPU power cable. The games I've been playing are nowhere near new to this system, and I have not installed any new programs around the time that this issue began. The system has not been moved or bumped, and I would prefer to re-seat the GPU only as a last step as I have a very small form factor system (Skyreach 4 Mini), and removing the GPU would require basically dismantling the entire build. Reliability History and Event Viewer show nothing.

PSU: HDPlex 400W AC-DC and DC-ATX (new to my build)
Storage: SN750 SE 1TB (about 3/4 full)
CPU: 5600X
Motherboard: Asus ROG X570-I
RAM: 2x8GB Corsair Vengeance LPX 3600 CL18

 

[Ralston18]

Update your post to include full system hardware specs and OS infomation.

PSU: make, model, wattage, age, condition (original to build, new, refurbished, used)? History of heavy gaming use?

Disk drive(s): make, model, capacity, how full?

Look in Reliability History/Monitor and Event Veiwer: either one or both tools may be capturing some relevant error code, warning, or even informational event just before or at the time of the BSODs.