axwack I don't know the answer off the top of my head. But I believe in the "shotgun approach" to problems like these, meaning try everything. Am I correct in assuming that you've already run DDU, removed all drivers under Windows safe mode, redownloaded fresh copy of drivers and reinstalled? If so then I would do the following:
1. Post all specs here, including power supply manufacturer and model. Take two photos of of the inside of your build: One of the entire inside of your build and the other of your power supply label. Upload those two images to imgur and share the link here.
2. Update BIOS to latest stable version, according to instructions on motherboard site.
3. Obtain another SSD. Download latest chipset drivers, update SSD firmware using manufacturer's SSD toolbox. Install clean install of Windows 10, Uplay launcher, and game that keeps crashing. Install discord app and whichever applications could be the culprit, and try to reproduce the problem. If you don't have spare SSD laying around then I would consider purchasing a Samsung 860 Evo 500 GB SSD from Amazon for ~$60.
4. Register your 1080 Ti on the EVGA website. If your tests on the new storage and Windows 10 install still crashes, then reach out to EVGA. Even if you're just past the warranty period, they "might" still honor it. I've literally purchased approximately 18 PSUs and GPUs from EVGA over the past five years, and they have fist class support. If it turns out that your GPU is the problem, and EVGA approves the RMA request, then ask for a "advanced RMA" so that you're not without a graphics card during this process.
I know my suggestions above sound extreme but it is what I would actually do, in as short a period of time as possible. If you suspect your GPU is the culprit, then you have no time to waste.
Addendum: The reason that I recommend an entirely new (different) storage device, as opposed to wiping and reinstalling Windows on your current SSD, is in case my suggestion doesn't work. If the problem persists then you can simply pop in your original storage and continue troubleshooting the problem without starting from scratch.