Originally Posted by Barbecuesaus
Sure will do
im clocking 3,5ghz now and its at 27 degrees , il do a stock test when i have more time
On-topic, im realy unsure if placing a second 6870 GPU would be good
i see more disadvantages then advantages .....
People are scaring you away.
I assure you your PSU is easily able to do both of them. If you saw a graph of a single 6870 pulling 300W that is going to be from the wall and not what the PSU is actually using. There is an efficiency calculation that needs to be taken into place.. So if the PSU in question was 80% efficient the load would have been ~240W which is probably the case.
Also, as far as heat goes. All you need to do is get a reference 6870 like I said on the first page so it will exhaust hot air out the back and put your XFX on bottom. Temps will still be fine unless your ambient is through the roof. For CrossFire you only need the same GPU series, they do not need to be manufactured by the same company. EX; You could XFire a 6850 by Asus with a 6870 by XFX. (Just an example).
And, as far as micro-stutter/driver issues/etc goes. Now this is probably the only thing you should even be concerned with. While this is a very possible issue, AMD drivers have gotten better than they were in the past with the older series of cards. It's impossible to tell you if you'll experience micro-stutter or not but I can tell you there is a lot of people that can't even notice it. Since you don't know what it is based on previous posts in this thread, here is a link:
As far as your CPU goes and bottlenecking, yeah it's not the best but you shouldn't bottleneck on most games. There are some very CPU intense games that will bottleneck a little it but it won't be anything bad. You'll be fine.