Hi all, I have a late 2012 27" iMac, and since owning it, I've been meaning to upgrade the RAM. For some reason I've managed to put it off until now. I have the standard 8GB (2x4GB) in there at the moment, and I want to upgrade to 16GB. Is it worth buying another 8GB(2x4GB) kit that I can get for £40, or is it better and more efficient to stick to two sticks and buy a 2x8GB kit? I'm never going to want to go beyond 16GB so using all 4 slots isn't an issue to me, and it's over half the price to get the second 8GB kit, but if there is a legit reason, be it performance or stability that means it's better to stick to two sticks, then I'll spend the extra Thanks guys!