Help! i have bought mis match ram?

[Impaa]

Hello i am really worried i have been careless and got the wrong stick i have an asrock b450m pro 4 
CORSAIR VENGANCE LPX 3000 MhZ 

CMK8GBX4M1D3000C16 x2 of 8gb  in my system.

(CMK16GX4M2B3000C15 x2 of 8gb / and i just bought this 
will i run into any issues ? PLEASEEE)
like im super thrown off i didnt read the model name   

[c-attack]

It’s likely going to give you trouble. XMP will not work with two mixed kits. They may be different ICs which will really complicate things.  This is not plug and play. 
 

If you need 32GB of ram you should be looking at 2x16 or 4x8 kit. At current prices it makes a lot more sense than trying to meticulously pair two different kits.