I bought this to upgrade the 8GB RAM on my Dell Inspiron 15R 5521 laptop.Installation was very easy after searching and watching some YouTube videos and I can confirm, that the model CT2KIT102464BF160B is fully compatible with my laptop as now when I check the memory usage it shows the full 16GB. When I bought the laptop a few years ago it has since slowed down significantly, not to mention I'm using it for more productive tasks that I do at the same time from home so I needed to improve my speed and skills. The laptop originally came with a 1TB mechanical hard drive, which I swapped out for an SSD of the same capacity before the RAM upgrade to see the difference it makes in and of itself. I have to say that the SSD upgrade has changed the laptop and it is MUCH faster now than it was when it was brand new. I upgraded the memory after the SSD as both the upgraded memory and the SSD were purchased at the same time and I can report that they are fully compatible and it is fully appreciated that the performance gain from this upgrade compares SSD was negligible for the performance gain from the upgrade. So if you had to choose between 1 of 2 to upgrade, I would definitely suggest upgrading to an SSD first. Usage up to almost 8GB and sometimes a bit more. Not to mention that I feel like my aging laptop is now much better at handling my current workload and more future-proof for a future increase in workload. 5 stars for compatibility and ease of installation. However, I've deducted 1 star because I believe the price of this older model of RAM was still a little high despite recent memory price drops.
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