I've been told it is important to use matching DIMMs when installing memory to take advantage of the 128 bit throughput. I'm looking to buy a new 27" iMac (mid 2011) which has 4 memory slots. If I put matching 2x2GB in 2 of the slots and matching 2x4GB in the other two slots, will that reduce its throughput or cause any problems? 

Do all 4 have to match or do each set of 2 need to match?


Question: Does SQL Server 2008 R2 Express have Intellisense?
Answer: try this to fix the problem, has to do with SP1 for vs2010 if you have that setup FIX: The IntelliSense feature in SSMS 2008 R2 may stop working after you install Visual Studio 2010 SP1