8gb ram of two different speeds

neieus

Distinguished
Just as SR says they should ways you should always buy them in matching pairs but to answer your question yes you can use them together however they will run at the speed of the slowest stick.
 

Ashish Bhelwa

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Sep 18, 2014
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I'm asking this because i already have 8gb ddr3 ram of 1333mhz installed on my motherboard earlier and now i want to upgrade my ram with 8gb ddr3 ram of 2133mhz, so what should with my 8 gb ram which i have installed earlier. can't i use them both to make 16 gigs of ram
 

Entomber

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Apr 21, 2014
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if you used both sets of sticks at the same time, you would just have 4 sticks of RAM running at the slowest speed, 1333MHz.

If you want your RAM to run at 2133MHz, you have to unplug your 2 existing, slower sticks of RAM. RAM cannot run at different speeds and CAS latencies within the same computer.
 

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