artefact and colored crash screen HD 7870 (Tahiti) Oc

doomoX

Honorable
Jun 19, 2013
20
0
10,510
hi, so i was playing around with AMD Overdrive and i think i may little push it more than enough..here is the max oc for this card:
http://www.techpowerup.com/reviews/VTX3D/Radeon_HD_7870_XT_Black/31.html i came step by step to 1200/1600 didnt change voltage and fan speed was normal Temperture was 77-81c far below that this card can take and when i run Valley Benchmark artefact was showing and colored crash screen i had to restart so i change to deafult settings..now everything seems to be normal i play games on ultra like before no artefact same FPS..So my question is did i have luck not damaging the card? or there will be some consequences later on? btw card is brand new -_-''