Nope, I haven't. Anyway I had sent it today to service. Will see what the result will be. Thankfully I didn't purchase this from an Apple store so in my terms of warranty if they can't fix this I'm entitled to a full refund and honestly this sort of issues I've seen along the years in my life on different brand computers (Sony Vaio, Dell XPS - all in one desktop) and the result was always the same. No matter what they've replaced the issue will still come back at some point. For me the best thing to do now, to avoid this in the future is to go for the full refund if they can't fix it. Sorry to say this, cause I love Apple products but this model is a failed one.
I would say that people that only uses this to listen music, surf the web will not have any issues, but for the rest of us who create content or play video games there is going to be issues with it.
I think it has something to do with the heat that video card is dissipating. And even if an update will come that will solve this it will only be because somehow they will reduce the power on the video card so it won't get to hot. But with this the power of the card will be reduced. Apple has done similar in the past with other product.
Thanks for the help anyway and for the ideas on how to troubleshoot this.
I'll keep you guys posted on the outcome from the service.