When I first built my current PC with the Ryzen 9 5900X, I picked up 64GB of DDR4 memory rated to run at 3600MT/s. At the time, this was the sweet spot for Zen 3 processors, and since I wanted enough capacity for gaming, streaming, and multitasking for years to come, I went with four 16GB sticks. I was a little skeptical about using four sticks at first, but fortunately, my kit had no trouble running at its advertised speed. However, that changed when I picked up the Ryzen 7 5800X3D last year.