Check your local Craigslist or other classifieds for cheap old GPUs. Or if you have another PC, borrow the GPU and power supply just to get it to boot.

So March is just eels?

You start with base HP at level 1. Every time you level up, you roll a die (which die is determined by what class you are playing) and add your constitution modifier.

So based on the other comments, I would check the cooler and anything else that was above the CPU to see if something got too hot and dribbled solder on the CPU. Also is the socket next to that drop clean, or are there other smaller droplets nearby?

Sounds like you learned a lot. As far as the belt tensioner and not being able to budge it, usually stuff like that is a matter of leverage. You probably just need a breaker bar. Those are basically a longer version of a ratchet and are very useful for tight bolts. Usually they are pretty cheap too.