I ordered more ram to run in dual channel. XMP Questions,Ram speeds ect

[CombustLemons]

I ordered aa Crucial Ballistix Elite DDR3 1866 8GB stick to go along with my other 8gb stick of the same kind. I went into my bios before and changed my 1 8gb stick speed to 1333(default speed that mobo sets it to) because I thought the other stick would run at a different speed and I didn't want any problems. Once I installed it I put the both to 1866 and everything ran fine. Is there any other settings I should enable in my bios? I have a Asus Maximus VII and I'm wondering do I need XMP enabled and does it help my ram in some way? I'm not sure and I'm looking for some guidance.

 

[geofelt]

You were fortunate.
Ram from different kits is not guaranteed to work together.

Run memtest86+. You should get NO errors for a full pass or two.
XMP is a profile set into the ram that lets the ram run at the xmp speed and cas numbers.
Usually, using xmp is the easy way to go.
I would not bother changing anything at this time.
Don't fix something that is not broken.