ASRock x99 Extreme4 RAM question.

[3DnTechNut]

I just installed the ASRock x99 Extreme4 and bought 64GB of 2400 DDR4 RAM in 4 16GB Kits (2x8GB); installing 32GB (4 x 8GB sticks) works fine using A1, B1, C1, D1, however if I add any of the remaining sticks of RAM and start the system, it hangs and will not boot up. So to get 64GB or 128GB of RAM do the 8GB or 16GB sticks have to be in matched, boxed 4 board kits?

Thanks,

 

[Calvin7]

If you want a guarantee that it works, you need to use a single kit. Combining multiple kits is not guaranteed to work. You are free to do your own compatibility testing, but it may not be an economically viable way to get a working setup.