Can You Use Two Different Brands of RAM (Mix Memory Modules)?


Does Reminiscence RAM Must Match?

RAM sizes will be blended, but it surely’s typically not really useful as it might probably lower laptop efficiency. It’s really useful to match RAM sticks by the identical producer, with the identical dimension and frequency.

RAM (random entry reminiscence) is a crucial laptop and smartphone part. The job of RAM is to recollect computations for a restricted period of time, in order that the pc processor doesn’t have to redo the computations each time.

RAM sticks by totally different producers are normally made out of differing parts. RAM from the identical vendor will be made out of various parts over time.

That is typically why RAM sticks are bought in kits of 2x4GB or 2x8GB, to make sure that they’re equivalent and suitable with one another.

Some motherboards are very delicate to this because it has to handle all of the RAM utilizing the identical specs of voltage and velocity. This makes it tougher to handle totally different sizes or makes of RAM.

Totally different sizes of RAM can be utilized collectively, however for them to carry out optimally, the identical voltage and controllers ought to work nicely with one another, and the motherboard. Often because of this, it’s really useful to make use of the identical mannequin in all slots.

The problem you’ll probably encounter with totally different RAM sticks is an incompatibility between the 2 RAM sticks, incompatibility with the motherboard, or a limitation in your motherboard’s design.

Issues to think about when shopping for RAM outdoors of kits:

  • Pace of reminiscence. A stick at 1600mhz velocity and one other at 1333mhz velocity will trigger the 1600mhz follow be slowed all the way down to match the slowest module.
  • Dimension of reminiscence. An 8GB stick will want 8GB or greater or it won’t work.
  • Latency of reminiscence. Latency of CAS 9 and CAS 11 will imply the pc runs at CAS 11, which is slower.

Twin channel mode can run totally different dimension RAM sticks, but it surely gained’t be optimum. For instance, a brand new 8GB stick and an present 4GB stick will carry out as two 4GB sticks working facet by facet, whereas the remaining 4GB of the brand new 8GB stick will run in single channel mode. It’s not as quick as utilizing two sticks of the identical dimension, however will probably be sooner than earlier than.

Utilizing two similar sizes of RAM sticks can yield as much as 5% further velocity in twin channel mode with no need further {hardware}.

A 5% enhance is minimal, however 5% extra velocity at no cost is a pleasant profit, which is why customers are really useful to make use of equivalent RAM sticks.

If there are greater than 2 slots, 3 sticks can be utilized as nicely. One pair will run in twin channel mode, whereas the final stick shall be in single channel mode.

For a assured run, the very same mannequin and producer of RAM stick must be used. Latency and voltage must also be the identical for the most effective velocity compatibility.


Disadvantages of Mixing RAM

  • Decrease velocity because the system downclocks to match the persist with the bottom velocity.
  • Decrease latency as a result of the pc has to match the persist with the bottom latency.
  • No twin channel efficiency advantages if RAM sizes are totally different.
  • Voltages for older modules won’t work on newer modules.
  • Compatibility points with the motherboard.
  • Stability points on the system.

To stop these points from cropping up, it’s really useful for customers to make use of the identical model, dimension, velocity and latency of RAM sticks for all slots. Customers may also take pleasure in a efficiency profit by using the twin channel with the identical dimension of RAM sticks with no need further {hardware}.

Planning Your Reminiscence Configuration

Relying on the producer of your CPU, the optimum specs will differ.

If you’re questioning how a lot reminiscence you should buy, it should rely on the workload you want to accommodate.

For video editing, for instance, 32 to 64 GB of RAM is really useful, whereas for gaming 16 GB will suffice.


For AMD processors, the most effective RAM velocity to purpose for shall be double the interior frequency of the Infinity Cloth – often known as FCLK or Fclock. This double knowledge fee will guarantee a degree of synchronicity between your CPU and RAM that can obtain optimum efficiency.

For Zen 2 and Zen 3 CPUs, the FCLK is 1,800 MHz; so a 3,600 MHz CL 16 RAM equipment is a future-proof velocity metric.

This equipment velocity has confirmed to supply better performance than a 3,200 MHz CL 14 equipment, regardless of having a bigger absolute latency metric (8.89 ns vs 8.75 ns).

Do note that the FCLK value can be overclocked; so

Do notice that the FCLK worth will be overclocked; so in case your workload requires sooner frequencies, you should buy kits which have a double-data-rate frequency of the overclocked FCLK worth.

For a full breakdown of the most effective reminiscence for AMD CPUs, test our relevant article.

Additionally, it should be famous that Samsung’s B-Die has been confirmed to be the most effective RAM-die for AMD processors.


Buying RAM sticks for an Intel CPU can also be fairly easy, as they’ve been benchmarked and factory-tested at a particular RAM equipment velocity: 3,200 MHz CL 14.

These specs are in accordance with Intel’s internal testing, so it’s secure to label this velocity because the candy spot for Intel CPUs.

Is it OK to Combine RAM Speeds?

It’s fully potential to function two or extra RAM modules at totally different speeds. Nevertheless, similar to mixing manufacturers, you’ll default to the lowest-performing RAM modules.

For instance, let’s say that one set of RAM modules are 16GB CORSAIR DDR4 3200 MHz with a 16 CAS latency. The opposite RAM module set is a 16GB TEAMGROUP T-Create Classic DDR4 2666 MHz with a 19 CAS latency.

If put in in the identical PC, each modules shall be diminished to the bottom frequent denominator, i.e. (2666 MHz) velocity and (19 CAS) latency to work collectively successfully.  

Conversely, the CORSAIR DDR 3200MHz with a 16 CAS latency sometimes prices extra and is crippled to a decrease usable frequency and latency. In flip, you aren’t utilizing your RAM to its fullest potential, stopping you from getting probably the most out of your RAM.

Merely put, you simply paid a value premium for a efficiency enhance you can not use.


Are you able to combine DDR3 and DDR4 RAM?

No, you possibly can’t combine RAM Modules from totally different generations. DDR3 and DDR4 RAM are bodily incompatible.

Are you able to combine totally different RAM Frequencies?

You’ll be able to combine RAM Modules with totally different frequencies, but it surely may transform problematic. All RAM Modules need to at all times run on the similar frequency, which means they’ll attempt to run on the smallest frequent denominator.

As a result of several types of RAM modules assist particular latencies at totally different frequencies, although, they won’t have the ability to sync correctly, inflicting stability points, or stopping you from POSTing or booting your system fully.

Are you able to combine RAM Modules with totally different sizes?

So long as the frequency, model, latency, and ranks of your RAM modules match, mixing totally different RAM capacities ought to pose no points normally.