Enter the data rate (MHz) and the CAS latency (CL) into the calculator to determine the ram latency in nanoseconds. Calculate any of the variables in the formula below given the other variables are known.

Ram Latency Formula

The following formula is used to calculate a ram latency.

RL = CL *2000 / DR

  • Where RL is the ram latency (nanoseconds)
  • CL is the CAS latency (CL)
  • DR is the data rate (MHz)

To calculate RAM latency, multiply the CAS latency by 2000 then divide by the data rate.

What Is RAM Latency?

RAM is random access memory, and it is the memory that is used for your open applications and programs while you are working on the computer, tablet, smartphone, or other device. When you buy RAM, you will see listings that start with “CL.” This number represents the Ram CAS latency.

CAS stands for column address strobe or signal. It is the number of clock cycles that it takes the RAM module to access a set of data in one of its columns. If a RAM kit has a CAS of 16, it takes 16 RA clock cycles to complete the task. Lower RAM latency is better.

Example Problem

How to calculate Ram Latency?

  1. First determine the CAS.

    This is the CAS latency and is often listed when purchasing RAM for a computer. For this example, the CAS is 4.

  2. Next, determine the data rate.

    This is the rate at which data can be transferred by the RAM. For this problem, the data rate is 45 MHz.

  3. Finally, calculate the RAM latency.

    Using the formula, we find the RAM latency to be 4*2000/45 = 177.77 nanoseconds.


Is ram latency important? In most cases, for a personal computer, ram latency is not a problem unless it’s very long and you are performing tasks that require lower latency.

In the tech field, such as giant server farms, this latency can be extremely important. The faster the speed, the more efficient and less costly to the business.

Is a low ram latency worth it? For personal computers and normal tasks, ram latency is not important. For individuals that want to play video games with low latency, it can be worth it to look into low latency ram.

Is Lower RAM Latency Better?

Lower RAM latency is better because it means that the RAM is faster. It has higher performance because it takes fewer cycles for RAM to send the data that makes the applications run.

There is latency in different devices, including the wireless mouse. However, companies have zeroed it out so that you don’t notice.

With RAM, low latency means that it takes fewer clock cycles to send data to the CPU once it is requested.

This means that you get better performance because requests are responded to more quickly. When the latency is low, you barely notice a delay between a request and the response.

What RAM Latency Is Good for Gaming?

Low latency is especially important for gaming because quick responses are critical to being successful. A CAS latency of 14 is considered an excellent latency because it is high performance and has no noticeable delay.

If the RAM has a CAS latency of 16, it is going to be slower, even though it is considered acceptable.

Which Is Better: Speed or Latency?

People always want to know whether RAM speed is more important or its latency. Speed is more important because as technology has advanced, you can achieve a higher level of performance with the same latency.

It is best to install as much memory as you can and make sure that it has a decent latency for your applications. The important thing to remember is that both are important, and you can’t judge one without the other.

You need to make sure that there is a decently low latency, but you should get the highest speed you can.

Can You Mix RAM of Different Latency?

You can mix RAM of different latencies, but the lower latency will run at the same speed as the higher latency RAM. Although you can do it, it isn’t advised to do it.

You should try to use identical memory chips when it’s possible. The important thing to remember is that all of the RAM will run at a higher latency.

Does More Bandwidth Increase Latency?

Your bandwidth is the maximum capacity of your Internet connection. When you have more of it, you can download more data more quickly. However, even if you have a maximum speed of 100 Mbps, your actual speed will be less because of other factors.

Your latency is what causes lag, and when you have higher bandwidth, the latency might become more noticeable. The faster Internet speed allows you to download faster, but the latency might max out at a lower speed. This is why you want to get the lowest latency you can.

Final Words

Your latency is the time that it takes for a message to be sent to and from the CPU. Lower latency means that it takes less time. Latency is what leads to lagging, so it is important.