Hi all, I've got a 4600 on the way and I'd like to install a 6800GT video card when it arrives.  My questions  are, does the PSU that comes with the machine provide enough power?  Does the case have enough cooling or should I add something like a VGA silencer to the card? 

  And, if anyone just has any experience with a 4600 and video card upgrades it would be great to hear some advice before I tackle this little project.

Thanks!

J