I used to study 8 hours before the exam. So no sleep if morning exam, start at midnight. Or start 6am if afternoon exam

Do you mean that you start stuyding 8 hours before the exam, or that you study for 8 hours?

Dude, Im already an engineer, and I can tell you that, is better to study 25% of the whole info, and have 100% sleep, than studying 100% and having 25% sleep...

8 hours before.  Productive time ranged form 4 to 7hours lol. And to be honest i more jsut staired at the pages in my notes then fully read them.

Haven't gotten the results yet.. I'm guessing pretty poor, but that's because a question I didn't study much on was worth 30% of the grade. I'm hoping for a low 70, but expecting somewhere in the 50%. I don't care beside the fact that I need a C in this class for my major

Get a good nights sleep instead.

For what it is worth I hope you did alright.

What did you end up doing anyway? Sleep then get up a couple hours early? Stay up and cram then grab an energy drink? inquiring minds want to know ;)

I got 7ish hours of sleep and studied two hours before the exam.

Well let us know how it turned out