I ran the MemTest software from a Linux rescue CD, and this memory module had no errors. It has worked flawlessly in my Dell OptiPlex 3050 desktop since I installed it a week ago. Compared to my existing RAM module, the only difference is that this new one has a letter 'R' at the end of the model number, and my existing one does not have that 'R'. In other words, I matched this module almost exactly to my existing RAM module, and they are working together in Dual Channel mode without any problems for a combined total of 16GB RAM.
Verified purchase: Yes | Condition: Pre-owned
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