Not my fix, but saw on another site and others confirmed it worked:
Tessellation fix for nvidia users.
Download nvidia inspector Open nvidia inspector Delete Tomb raider 2013 profile Find hitman absolution profile Link tombraider.exe Change if you want af, aa and so on Press apply button And now hopefully you have no crash anymore with tessellation on. Have worked for me now an hour with no crash, use to crash before after 1-2 minutes after activating tessellation.
Thanks goes to a guy on steam for this fix.
Upcoming Horror games - http://tinyurl.com/ambtajo
I didn't have the crash on my 560Ti on latest WHQL drivers, but Tesselation caused a weird graphical issue which was expecially noticeable on Lara's face in the benchmark, was absent or not noticeable during gameplay though.