different ram speeds in same machine

[natshill123]

is it possible to have two 4gb sticks of ram at 3200mhz and got an 8gb stick at a different speed eg 2400mhz and for the system to still function normally?

 

[bmockeg]

They will all run at the lowest speed. You are going to use 3 sticks? That will also put you in single channel instead of dual.

 

[TJ Hooker]

RAM purchased separately is never guaranteed to work together, but if it does it will likely need to be run at speed of the slowest stick(s) e.g. 2400 MHz.

I actually don't know what would regarding single vs dual channel if you were to put the 2x4 GB sticks in one channel and the 8 GB stick in the other. It might be dual channel, or maybe it'd run in flex mode (basically part dual channel part single channel).