Mixing two 4GB Ram of different brands

[kyd15]

Will a SAMSUNG 4GB PC3-10600U DDR3 1333MHz work with my existing G.skill 4GB
DDR3-1333 / PC3-10600 DDR3 SDRAM UDIMM?
I was not able to find the exact G.Skill model.

 

[Gam3r01]

Possibly.
RAM is only guaranteed to work in the matched kits its sold in. Even if you buy two identical kits, on their own, there is still a chance it wont work.
Give it a shot, you certainly wont damage anything by trying.

 

[ArchitSahu]

Yes, but it will be prone to errors as it is mixed and matched RAM. However, they are are the same speeds, so it should be okay.