Just wanted to get clarification since it is difficult to track with all the different threads: iMacs 2.8 (early 2008), or now previous generation, support RAM as follows: - Apple officially supports a maximum of 4GB on these machines - Some users have reported that 6GB work fine - Some users have reported that 8GB might or might not work. Still not clear what causes this behavior but it sort of goes from recognizing the whole thing (8 GB) to just one stick (4 GB) I am getting one of these iMac 2.8 (refurb from Apple) and want to maximize the memory. If 8 GB work fine, that is what I would like to do, otherwise I am not sure about going 6GB (4GB + 2GB). If I just keep it at 4, I guess it would be better to have 2GB + 2GB rather than just a single 4GB, but it means that in the future, if there is no issue managing the 8GB once Snow Leopard is out, I will need to replace the 2x2GB for 2x4GBs. I will use the machine for some VMware, development, iLife, etc. and maybe the odd gaming. Would there be a noticeable performance boost with 6GB (4GB+2GB) as opposed to 4GB? Will there be a difference between (2GB+2GB) vs (4GB)? Any advice on this would be appreciated.