Random lock ups and artifacting

[Mark3h]

So twice tonight, both while watching DayZ videos on youtube. My screen has gone a bit nuts, with red artifacting covering most of it. Followed by a system lock, which requires the pc to be reset.

I'm guessing it would be my graphics card. MSI twin frozr II GTX560ti 1gb version.
Just posting here to see if you guys agree the card needs RMA'd, incase I'm missing some quick fix.
It was bought last April. Should have 3 years warranty on it.

 

[Shady89]

id say it was your g card , you got a spare to try? could even be your powersupply struggling at higher loads? I dunno tbh.

 

[wazza300]

test by downclocking the gpu memory,try with 200mhz less and retest,artifacting usually points to gpu memory

 

[Mark3h]

have dropped the clock on it. hopefully it'll hold.
I just find it strange, both times were while I was on youtube, not while I was playing Battlefield 3 or DayZ.

 

[mmj_uk]

Is it a factory OC model? best to try reference speeds if so.

 

[Mark3h]

It is the factory OC model yes. I have dropped them below the factory OC.