7970 Lightning BE problem

[MixtaMike]

Over the last few weeks ive had about 7 occasions where I had major Artifacting ( lines on screen )
And ive had to switch off PC to fix it.

This has happend once while gaming the rest were when I was watching youtube videos or watching streams in twitch.tv

Ive done a fresh Driver install already and it has happend since.
Swapped which port I connect Monitor too

My temps seem fine highest is around 61c while gaming on intense games.

Idles around 32c

Ive only had the card 3-4 months

Should I query a return?

Specs:
i5 2500k @ 4.6ghz via OC genie
8gb Mushkin 1600
MSI GD45 mobo
Win 7 64 bit
7970 Lightning BE @ Stock 1150ghz
730w Be Quiet

 

[MixtaMike]

7970 Lightning BE @ Stock 1150

its at default clocks (stock)

I havnt overclocked it

 

[MixtaMike]

Ok ill try your suggestions when im back at home an see if it works.
Hopefully it does if not i will try Chrome

Been with firefox for donkey years though.

Hows norwich weather? Its luvly in great yarmouth