I just built my PC 3 weeks ago and it runs great. Played a dozen games without problems.
Specs: EVGA GeForce GTX650TI Boost Superclocked 2gb Video Card
8 GB RAM
Win 7 64 bit
I installed Skyrim Legendary and played it right away on Ultra (reccomended) The FPS was smooth. 30 minutes in it CTD. Keep in mind, no mods or anything like that. I tried it again on High. Crashed yet again.
I tried installing some mods that supposedly prevented CTD and helped stability but to no avail. I even tried it on low and it crashed eventually.
Other fixes I tried are changing the sound settings to low CD quality. I tried turning off all other programs including steam and anti-virus. I tried unselecting the DLCs and it still would crash.
The crashes are random. I can be in a room, in combat, it doesn't seem to make a difference.
I think that covers all of the info. All help would be much appreciated.