I just bought a 1080P display 1920x1080. 23 inch monitor. I have an early 2008 mbp with 2.5ghz core 2 duo, 4gb ram, and 512mb 8600gt. and when I close the lid to get the full resolution on my 1080p monitor, everything gets really laggy... Is it because my computer can't handle it? It's weird, when I do Dual Display, which operates at full resolution too..i think, it has no lag at all.. I was wondering why I'm experiencing lag? Thanks!