If you got a DDR4-supporting laptop, or perhaps a mITX system that requires DDR4 SODIMMs with 2666 MHz support out of the box, you don't have that many options today. Team Group's T-Force Vulcan Gaming Series of DDR4 SODIMMs come ready for that and more.
You do software updates to get the most from favourite programs right? Updating a motherboard BIOS can in a timely manner is also critical. The guide to Flashing a Motherboard BIOS spells out the often complicated steps in plain english. PCSTATS Tips