Is it possible to run 2x1866mhz ram with 1x1600mhz ram?

juronoro · Sep 25, 2014

Hey guys!

I am very new to installing pc components but luckily i managed to "install" 2x4gb 1866 mhz RAMs. I still have one spare 4gb 1600mhz ram, which was originally a part 2x4gb kit.

Can i just add the single 1600mhz ram in the 3rd slot? will it work with the set of two 1866mhz rams?

Thanks a lot! (I know i can just try it but i really dont want to mess up as the pc is quite expensive and i have no experience whatsoever)

Snipergod87 · Sep 25, 2014

Yes but they will run at 1600 speeds, and you will also lose the "DDR (double data rate)" ability of DDR RAM.

Spencervde · Sep 25, 2014

When you run to ram at different speeds, they will run at the lower clock rate of the ram. So in your case the 1866mhz sticks will run at 1600mhz speeds.

tambeshakunt · Sep 25, 2014

You can, althogh it is never advised or recommended to have a such a configuration with 3 unmatched sticks. If you do, you have to have ALL of the ram running at the specs of the SLOWEST stick. i.e 1600mhz.

juronoro · Sep 25, 2014

Snipergod87 :

Thanks!

So basically at the cost of running it at lower mhz and losing the DDR ability, i can have more memory. Seems like its not even worth it :/..

bgunner · Sep 25, 2014

@ OP Snipergod87 has no clue what he is talking about concerning the losing the DDR. This is completely false! The ram will always run in a duel data rate configuration no matter what sticks are put together.

Like mentioned before Yes it is possible they will run together but at the slower speed and at the higher timings if different. Be Forewarned though, Not all ram sticks will play nice with each other. Some stick will work together some wont. The only way to know if this is the case is test them.

Once you have installed the new ram and have set the bios correctly, I recommend using Memtest86+ to test the ram to see if it will be stable (play nice together). This program is free and works very well for testing ram.

tambeshakunt · Sep 25, 2014

bgunner :

@ OP Snipergod87 has no clue what he is talking about concerning the losing the DDR. This is completely false! The ram will always run in a duel data rate configuration no matter what sticks are put together.

Like mentioned before Yes it is possible they will run together but at the slower speed and at the higher timings if different. Be Forewarned though, Not all ram sticks will play nice with each other. Some stick will work together some wont. The only way to know if this is the case is test them.

Once you have installed the new ram and have set the bios correctly, I recommend using Memtest86+ to test the ram to see if it will be stable (play nice together). This program is free and works very well for testing ram.

Agree. No such thing as 'losing DDR' :pfff:

juronoro · Sep 25, 2014

bgunner :

Wow, Ok, I wasn't expecting that.

Thanks for detailed answer, i will give it a try, run the tests and see if it is ok.

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Is it possible to run 2x1866mhz ram with 1x1600mhz ram?

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