2x16GB and 2x8GB RAM Together
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Can I Use 2x16GB and 2x8GB RAM Together?

Though It is possible to use 2x16GB and 2x8GB RAM together, it is not recommended due to some major issues. For example, mixing RAM kits can cause issues with XMP settings and may result in slower performance.

Also other issues like BSOD, auto restarts, and hard crashes may appear over time.

Pros and Cons of Mixing RAM

  • Increased total RAM capacity
  • Possibility to repurpose older RAM modules
  • Cost-effective solution for upgrading


  • Potential compatibility issues
  • Reduced performance
  • Increased instability

RAM Compatibility

Before we dive into the specifics of using different-sized RAM sticks together, it is important to understand how RAM compatibility works. When it comes to RAM, compatibility is determined by a number of factors, including:

– RAM type (DDR3, DDR4, etc.)
– RAM speed (measured in MHz)
– RAM voltage (measured in volts)
– RAM capacity (measured in GB)

In order for RAM sticks to be compatible with each other, they must have the same type, speed, and voltage. Additionally, they should ideally have the same capacity, although it is possible to mix different capacities as we will discuss later.

Factors to Consider When Mixing RAM


When mixing RAM of different capacities, it is essential to consider the total amount of memory your system will have. In this case, you would have a total of 48GB of RAM (2 x 16GB + 2 x 8GB). While this configuration might work, it could cause performance issues if the RAM modules have different speeds or other specifications.


RAM modules come in various speeds, measured in MHz. Mixing RAM modules with different speeds might work, but your computer will default to the slowest speed among them, potentially affecting performance.

CAS Latency

CAS Latency, or CL, is the number of clock cycles it takes for the RAM to respond to a request. Mixing RAM with different CAS latencies could cause compatibility issues and might not work at all.


Different RAM modules might require different voltages to operate correctly. Mixing RAM with different voltage requirements could cause instability or damage to your computer.

Motherboard compatibility

Not all motherboards support mixing RAM of different capacities, speeds, or other specifications. Always consult your motherboard’s manual to ensure compatibility before mixing RAM.

How to Install Mixed RAM Successfully

Here’s the step-by-step process you can follow to install your mixed ram –

Step 1: Check your motherboard’s compatibility

Consult your motherboard’s manual or the manufacturer’s website to ensure it supports mixed RAM configurations.

Step 2: Consult your computer’s manual

Refer to your computer’s manual for instructions on opening the case and locating the RAM slots.

Step 3: Match RAM slots

Typically, motherboards have color-coded RAM slots to indicate which slots should be used for matching RAM modules. Install the 16GB modules in one color and the 8GB modules in the other.

Step 4: Test for stability

After installing the mixed RAM, boot your computer and check for any issues or instability. Run a memory diagnostic tool, such as Memtest86, to ensure the RAM is functioning correctly and without errors.

Alternative Solutions

If you’re concerned about compatibility and performance, consider purchasing matching RAM modules instead. This will ensure optimal performance and reduce the risk of issues arising from mixed configurations.

Upgrading your computer

If your current computer is outdated or unable to support the desired RAM configuration, it might be time to consider upgrading to a newer model that can accommodate your needs.


Using 2 16GB and 2 8GB RAM modules together is possible, but it comes with potential compatibility and performance issues. Always consult your motherboard’s manual and verify its compatibility before attempting to mix RAM. If you decide to proceed, follow the installation steps carefully and test for stability. Alternatively, consider purchasing matching RAM or upgrading your computer for a more reliable solution.

Frequently Asked Questions

Can I mix different brands of RAM?

Mixing different brands of RAM is possible, but it can lead to compatibility issues. Ensure the RAM modules have the same specifications, such as speed, CAS latency, and voltage, for the best results.

How do I know if my motherboard supports mixed RAM configurations?

Consult your motherboard’s manual or the manufacturer’s website for information on supported RAM configurations.

Will mixing RAM void my warranty?

Mixing RAM should not void your warranty, but check with your computer’s manufacturer to be certain.

Can I mix RAM with different capacities, speeds, and CAS latencies?

Mixing RAM with different specifications can cause compatibility issues and reduced performance. It is best to use RAM with matching specifications.

Do I need to update my BIOS to support mixed RAM configurations?

Updating your BIOS may be necessary to support mixed RAM configurations. Check your motherboard’s manual or manufacturer’s website for specific instructions on how to update your BIOS.

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