Blender rendering makes my pc randomly die and restart Blender has suddenly decided that it is going to randomly kill the power to my pc whenever I render something. I have always been running my renders in Cycles Render and no problem no matter how long or what the quality (Samples) are. I can leave Blender open and model for hours on end... no problem. I can run various programs like the Adobe Master Suite for hours on end... no problem. But when I render in Blender, my power crashes. My motherboard is new, ram is new, graphics card is working perfectly fine, I have 4 hard drives that I reinstalled windows on and installed the latest Blender on... problem never goes away when I am rendering in Blender. I have also done the obvious super clean/vacuuming and done it with anti-static cloths, grounded the case, etc etc etc

Anyone have any idea what could be going on?
Sorry didn't quite understand, did you mention you made a pc upgrade to your motherboard RAM and graphics card? Did the cashes start happening only after the upgrade?

If it's crashing your whole computer it is likely a hardware problem, and not Blender related, though it is hard to say.

Rendering is a pretty demanding task that taxes your computer hardware, it may be overheating, or your power source may be insufficient for all your hardware and that is only revealed on heavy tasks,hard to tell this way.

Have you tried using some sort of hardware or system monitor with logging capabilities while rendering? Maybe it provides some insight into what is happening.