laviniuc :
G-star93 :
No, bottleneck would be with AMD cpu's you should be fine with i5. But crossfire isnt good. It's better to have 1 good Graphics card than 2 weak. also 1200w is too much, you could be running 4 280x's with 1.2kw
always better to use an overpowered psu, yes, 1200 is waaay too much, but if he can get one, it's a good psu, no reason to advice against it.
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story5&reid=222
Sorry but thats totally wrong. There is a VERY strong case for not using a totally overkill wattage PSU; efficiency.
Most PSUs are rated for efficiency at 80+ load. This means they will only running at those famous '80+ Gold' ratings when your system is actually drawing 80% or more of the wattage it can give.
So, if the total power draw of your system is only 700w, and you have a 1200w PSU, that is no where near 80% load. Therefore, your expensive PSU will not be running efficiently, and consequently will be costing way more in energy bills every month than a more suitable wattage PSU would be.