Could using CUDA toolkit potentially lead to damaging logic board or power supply?

I’m not too familiar with hardware side of computers so excuse the question if it’s not phrased in the best way. Story is I bought this computer for the sole purpose of training machine learning models that normally take forever. I wanted to use a GTX 1070 Ti, so I got a Mac Pro 2009 to go with it. Okay, I use the computer for the first few days, no problem, everything’s working fine until I finally finish my code to actually start training. I install the latest CUDA toolkit (10.0) from Nvidia’s website and start the training, immediately my computer abruptly shuts down as if you just unplugged it and it won’t turn on. I’ll take it to a repair shop see what’s wrong, it’s either the power supply or the logic board but I’m curious if using CUDA could be damaging to the hardware like this. I don’t want this to be repeated with the new hardware. If this is the case, are there certain requirements I have to meet to make sure this doesn’t happen?

For context, there is another GTX 120 already on the Mac Pro, so I’m using multiple graphic cards.
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Running CUDA software per se won’t damage hardware. GPUs have circuitry that throttles the GPU if power draw or temperature gets too high.

Running CUDA software can lead to the GPU consuming power up to the documented limit. For the GTX 1070 Ti, that is 180W. If your power supply cannot supply that much power draw, it will shut down, causing a hard reboot of the system. Do that often enough, and it might kill the PSU.

Electronics age, due to both electric current and heat. In my experience, for consumer-grade systems, the power supply is the component most likely to die from ordinary use, followed by DRAM. The power supply of a nine year old machine is quite possibly already on its last legs.

You can damage hardware when installing a GPU. Mechanically, by incorrectly inserting the GPU into the PCIe slot: make sure it goes in straight, is pushed in all the way, and is then secured at the bracket. Electrically, by electrostatic discharge which is like a 10,000V lightning bolt striking the chips: make sure you are properly grounded with a strap during hardware installation to prevent that from happening.

Make sure your power supply is sized correctly. Ideally the nominal power of all system components combined should not exceed 60% of the nominal rating of the PSU. From what I can find, the Mac Pro 2009 had a 980W power supply, so you should be fine in that regard. Make sure all the power cables to the GPU are hooked up properly, without using any tricks like Y-splitters or six-pin to 8-pin converters.