Mixing 2 sets of rams in asrock x79 extreme 9

[calvinlin]

I am currently running 4x 4gb of ripjaws X 1600mhz cl9 ram in my X79 board. Even though they are 2 sets of dual channel from my Z68 board, they work fine in quad channel.

However, I need to add more ram and my hsf is block the first ram slots on both sides, which means I can only go lower profile ram.

If I were to get another set of ram, say g-skill or kvr 1333mhz cl9, will my ram still run in quad channel, just at 1333mhz. Or will it totally not run?

 

[abekl]

If the ram matches in spec to the original ram, it probably will run at full speed without any problems.

 

[clutchc]

As long as the channel pairs are matching, you will be fine. But you have to keep the timing, voltage, etc the same for all 4 sticks. Match the specs to the original.