I had problems with my computer. It said memory problems-- both using Microsoft diagnosis and Dell diagnosis. So I am not a technical guy-- I hired a professional computer repair person- from a company--- We tested both RAM memory - and BOTH were bad after about 14 months-- even though the packaging clearly says-- lifetime guaranty.
I don't think that the RAM memory should last forever-- but 14 months seems like rather BAD results. The original DELL memory 8 GM RAM lasted more than 3 years with no problems.
The technician said on the one hand -- he thought PNY was generally good. On the other hand- he had never seen in more than a decade of servicing computers- BOTH memory cards go bad.