Holy bottleneck Batman!
If you are within the return period, send the RAM back. If this rig is simply for gaming I would look to a new motherboard, new DDR4 RAM, and an Intel 8xxx or 9xxx i5 processor.
If you cannot return the RAM, in theory you may be able to upgrade the processor to a number of (slightly better) outdated and obsolete models. It would really be akin to burning money at this point. I would suggest, for that option, to get the model of your motherboard and look at the compatibility chart for the various CPU it will support.