First time posting so not sure if this is the right place but here it goes.
Today I tried to install a Samsung 4GB DDR4 PC4-21300 4GB DDR4 PC4-21300 ram stick into the empty slot of my Aspire A515-43 but the laptop did not show any added ram and began to run significantly slower. So I removed the ram stick and now it runs fine.The reviews of this ram specifically mention the Aspire A515-43 and how much better it preforms because of it. What's going on here? Any help would be appreciated.