Hi guys, bought myself a new predator desktop GTX1070 and it has came equipped with 16GB RAM installed. I play poker and am looking to run simulations that can require up to 100GB of RAM. I know this is a big ask of the desktop however I seen that the windows 10 64 bit-processor could handle 128GB of installed RAM usage. I am open to buying as much as I can possibly get but I am a bit of a noob when it comes to what will fit in my motherboard with only 4 slots. 3 of them are in use at the moment and the computer tells me that one slot is available with only x1 data lane available. I am unsure of what this means for the amount of RAM that i will be able to install into my computer. I don't want to buy too much and then there is not enough space available. Is someone able to fill me in on what RAM I will be able to successfully add into my computer given the information above? Would be very much appreciated

Computer is Intel core i7 @ 3.20 GHz if that means anything. Thanks