Hey everyone! I got a very sweet deal on an iMac 5k with retina display but i have a question about upgrading the RAM inside of it. My model will have the 4.0Ghz i7-processor, 256GB SSD and the M295X 4GB graphic card. But it only comes with 8GB RAM (2 x 4 GB sticks) preinstalled. I definitely wanna upgrade again to 16GB of RAM, since i used this as well in my old Macbook Pro. Now my question: Since there are already 2 x 4GB preinstalled, i could go the cheaper way and just buy 2 more sticks with 4GB to reach my 16GB. But i don't know if this slows down the machine then? Would it be better to buy 2 sticks with 8GB and replace the 4GB sticks or is it fine to go with 4 x 4 GB sticks? Sorry if this was discussed before, i searched for a similar topic but couldn't find one.