Well DDR5 would indicate 5th generation DRAM which is still 4-7 years away, considering DDR4 is just starting to be introduced, and very slowly and recently introduced at that. GDDR5 indicates 5th generation Graphics RAM, which is what pretty much all modern GPU cards have. For recent games 1 or 2 GB of GDDR5 RAM is plenty sufficient for about 90% of whatever you want to do with it. Also I admire the Death of the Family profile picture.