I have a maxed out 27" and my Daughter bought her 27 the same day but went for just 8gb ram instead, now wants 16GB! 
-Does the iMac have 2 x 4GB cards installed or one 8GB
-If there is 2 x 4GB, does Apple sell 4GB cards or only 8GB
She is apprehensive about aftermarket ram so would prefer to buy from Apple
....Gary
-Does the iMac have 2 x 4GB cards installed or one 8GB
-If there is 2 x 4GB, does Apple sell 4GB cards or only 8GB
She is apprehensive about aftermarket ram so would prefer to buy from Apple
....Gary