Welcome to the forum.
AVCHD (and any H.264 material) is highly dependent on one's CPU power. Please see this FAQ Entry, and answer the questions there, especially the computer specs.: http://forums.adobe.com/thread/961741?tstart=0
My CS5/AVCHD 1st Impressions June 2010 http://forums.adobe.com/thread/652694 includes a link to the computer I built... since the GTX 285 is no longer sold, I would now go with a GTX 460 or whatever is the current "best bang for the buck" - AND I would buy 4Gig-by-3Sticks memory to be able to expand from 12Gig to 24Gig if needed
As Hunt says, you need a STRONG computer to effectively edit AVCHD
Are you sure you shot 1080p/60 and not 1080p/30, which is much more common? Select a clip in the project panel and right click, then select Create New Sequence From Clip. That will make sure your sequence matches what you shot.
AVCHD needs a beefy computer, so please answer those questions asked above.
Thank you guys so much! I feel like such an idiot. I totally ignored the fact that my laptop had 2GB and Premiere Pro requires at least 4GB. I just ordered more RAM, wish me luck
Just thought i would ask you, i am having similar issues.. However, I am using a 12-Core mac Pro
12-Core 2.4GHz (2.67GHz Turbo boost)
40GB DDR3 1333MHZ RAM
ATI 5770 Radeon Graphics card
Is this computer more than capable of handling AVCHD? The camera im using is a Sony NX5U