I could really use some advice since I'm totally unfamiliar with ram. So I've been looking around online and in the forums and was hoping somebody could clarify some things for me based on what I've read and found. Does 2133mhz DDR3 ram in an iMac instead of 1867MHz/1866MHz really work and are there any repercussions? Does the difference between the recommended 1867MHz/1866MHz and 2133MHz make a huge difference? I normally run multiple graphics software simultaneously and sometimes video editing too. Am I correct in understanding 32GB sticks for the iMac don't exist? I was having trouble finding it, but then again I know nothing about buying ram... The specs on the Apple page say the highest the iMac can go is 32GB, but what is the highest it can really take? 4 sticks of 16GB making it 64GB? Is 128GB even possible or am I looking at the wrong ram sticks? Basically, I'm trying to figure out the best way to optimize the ram in the iMac, but I think I've gotten myself confused. Some minor questions are: Which brands are more reliable? Which are the quietest? (I have crazy hearing and can hear electricity buzzing or something. My old computer's buzz drove me nuts) Any advice is greatly appreciated. Thank you in advance!