Hi, I just added a 2GB Crucial DIMM to my early 2008 MB Pro. I thought adding one 2GB would bring me to 4GB, but found two 1GB cards in the memory slots. So, I added the new 2GB and kept one 1GB, thinking I'd have 3GB. But according to my Hardware overview, I still only have 2GB. Can you use a 1GB and a 2GB DIMM card for a total of 3GB, or do I need another 2GB Card? On another note, at least in terms of browsing, it's like I have a new machine. I don't know if it's the new card, but pages are loading twice as fast - right at start-up. Thanks.