Thanks Hippie. I try to help when I can but I am no expert
Anyways that video was very helpful and the performance drop from X16 to X4 seems to be quite alot and it was kinda what I expected. So performance wise if I was to do Crossfire it would be best to get a motherboard with two X16 PCI Express slots or more. So I take it that the UD3 out of those I listed would be better.
Vezina: Personally I would prefer to run a single card anyways but I am just looking at the possibilites.
I spoke with AMD as I had some questions for them such as what the maximum heat my graphic card could handle as I want to know what would be safe limits. Of course there is no problems with my temperatures but I like to know things like that.
Anyways I also asked them which is their best gaming card currently (As I find all these series and cards confusing, some is good for gaming while others are for other tasks) and they said if I was to upgrade then I should go for a HD 7870 as that would be a step up from the HD 6870.
They also said that their fastest card currently is the HD 6990 but performance wise they said that the 6870 isn't that far away so for now they wouldn't suggest an upgrade.
And they also said that if in the future I wanted/needed a upgrade it might be better to Crossfire two 6870 as that would be equal to the 6990 in performance.
So thats why I was looking at maybe buying a new motherboard if I was to do that. But for now I probably just stick with one HD 6870 as there is nothing wrong with my computers current performance.
Thanks for the advise guys, you are still awesome