Which is faster: nanoseconds or MHz?
Which is faster: nanoseconds or MHz?
I'm curious about whether nanoseconds is the optimal measure for gaming performance in RAM or if it's the MHz value that matters most. I'm currently testing with DDR3 memory at 1908MHz, which should result in a latency of around 5.24 nanoseconds. My default setting (1333MHz on 9/10/10/24) gives about 3.33 nanoseconds.
The higher the frequency, the better it is (as long as it doesn’t harm the CPU),
Lower latency (CAS refresh rate) is preferable.
It’s a complex subject, but generally, if you understand your CPU, you can easily pick memory that works well in a dual-channel configuration.
For instance, with a modern Intel i7 running at 4.5GHz, using 2400MHz and a CAS latency of 2133MHz should be fine because the frequency is high enough to avoid bandwidth problems.
It’s best to always check your CPU’s specific recommendations before deciding.
The higher the frequency, the better (until it stops helping the CPU). Lower latency (CAS refresh) is preferable. It's a complex issue, but generally, if you understand your CPU, you can easily pick memory that works well in a dual-channel setup. For instance, with a modern Intel i7 at 4.5GHz, using 2400MHz CAS9 DDR3 in dual channels should be fine since the frequency is high enough to avoid bandwidth problems. Always check your specific CPU for the best recommendations. My i7-3770K @4.5GHz with 2133MHz CAS9 DDR3 in dual channel performs well, but for most tasks 1333MHz is sufficient. (DDR3 values don't directly apply to DDR4.) We have the same CPU, but mine is overclocked to 4.4GHz. You can try 2000MHz with 11CAS(5.5ns) or 1908MHz with 10CAS(5.24). Which would you prefer for gaming?