03-02-2019 09:00 AM
Both P52 and P72 machines are currently being sold on the sales site with 4X32GB so it is possible. I have seen reports of people having problems adding DIMMs that were not Lenovo-brended. The first startup after adding or changing memory can take a long time while the machine updates the configuration. People give up and turn it off when there is no problem. When I upgraded my P70 from 2X16 to 4X16, it took just over 2 minutes for the first boot. After that, it was quick, like normal. Turn it on and go get a cup of coffee. If you buy non-Lenovo RAM, always check the seller's return policy. 32GB DIMMs are expensive.