can i mix ram of two different companies??

mrt3

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yes you can use both at a time, but it is recommended to have exact same model to avoid unwanted problems.
 

R0nie

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unwanted problems like??
 

sheriff12

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For the best result and problem free computing it is advisable to purchase all the RAM you are going to install in a bundle pack. Even using the same modules from just one manufacturer can cause problems if they are not bought as a bundle. Speed variations between the sticks can cause erratic behavior.
 


Failures to boot, random crashes, not using / reading all the RAM (incorrect # of GB's) -- to name a few.
I agree with Tradesman1.
To emphasize: I rebuilt my wife's PC several years ago. Mobo changed from a 3 DIMM board to a 4DIMM. I had 3 matched sticks of RAM from Crucial. I shopped for a 4th one and when I found it I talked directly to Crucial Tech to compare the properties; they assured me the new Crucial RAM would work with the old Crucial RAM.
Once installed it did in fact "work" but I was NEVER able to set up dual channel memory so it operated as single channel. Not too many months later I replaced that RAM with matched set of Corsair and Dual-channel fired right up.