If you mix sticks of RAM with different clock cycles, it will all run at the lowest frequency. Because of this, as long as you stick to the current standard, you know you'll have RAM that runs at a decent speed. The DDR generation and the clock cycles are correlated you won't see ultra-fast numbers on ancient DDR2 RAM, for example. Faster RAM is better than slower, but in most cases, it's not noticeable. For instance, 2666MHz RAM runs 2.666 billion cycles each second.Īs you'd expect, the higher this number, the faster the RAM and the smoother your experience. These are offered in megahertz, and represent how many cycles the RAM can perform every second. In addition to DDR, you'll also see a RAM stick's clock cycles listed on its product page. For a new build, stick with DDR4 since it's the best we have now. If you're buying more RAM for an existing machine, make sure it matches what your motherboard supports. While DDR5 is on the way at the time of writing, it's not commercially available yet.ĭifferent generations of RAM are not compatible with each other, so you can't plug a DDR4 stick of RAM into a motherboard with DDR3 slots. You'll still see DDR3 RAM around, but it's mostly been superseded by DDR4, which is the current standard. Over time, this technology has improved, which has led to DDR2 and further versions.ĭDR2 is quite outdated, so you're unlikely to come across it now. DDR stands for Double Data Rate, which means that it operates twice per every clock cycle. Virtually every stick of RAM you see will have DDR and a version number accompanying it. Not all RAM is the same it has other specifications to consider. The amount of RAM that you have for gaming is only part of the story.
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