New GPU overclock black screen/hardlock

[T1GERTEA]

i got a new gpu and it and when i overclock it, it doesn't show any artifacts or anything, but at around +100core or more, i run unigine heaven and for about 20mins, then my computer black screen and hardlocks, is this a problem with the gpu? or something else?

[Samfisher]

Lower your overclock...?

[MrBucket101]

i got a new gpu and it and when i overclock it, it doesn't show any artifacts or anything, but at around +100core or more, i run unigine heaven and for about 20mins, then my computer black screen and hardlocks, is this a problem with the gpu? or something else?

lol thats how you know your overclock isn't stable

 

add more voltage, or back it down

[Aphala]

Reduce clock speed by 20mhz until it's not going to artifact.

 

Sounds like silicone lottery wasn't in your favour.