Firstly, I'm not a huge expert with PCs. The only time I've ever opened up a PC was for this one, when I upgraded the cooling to a Cooler Master Hyper 622.
This PC is about 6 months, with the cooling upgrade about 5 months old after it was running hot on my games.
Recently in the past week, the PC has started crashing intermittently, screens go black, and the cooler fans than go into hyper speed. I keep my temperature readings open on my screen and when the crashes happen, it's never in hot ranges as the cooler upgrade has really helped.
As well, its crashing under different scenarios. Sometimes it crashes when Im just browsing the internet. Othertimes, it crashes while gaming. Adding to that, sometimes I can play Microsoft Flight Sim and it doesnt crash over 8 hours of playing. Its really hard to replicate the problem as some days, it doesnt crash at all.
Im not an expert on comps and I didnt see anyone else having this issue with this PC, so I didnt really know where to start. Any guidance would be greatly appreciated.
[Edited the thread to add model name to the title]