Review on 💪 Optimized Vengeance Performance Memory Kit by Emily Martin

it works on my 2017 27" iMac. You need to remove the factory installed RAM and install these modules in their place (1st and 3rd Slot). I moved the factory installed RAM to slots 2 and 4 and they seem to work. I currently have 40GB of RAM. I didn't install them properly at first, and that's why my iMac wouldn't turn on until the RAM was moved to the correct slots (and the SMC was reset).