Two sticks of ram, two different companies - dual channel?

I can't remember. My cousin Has a stick of Kingston 512 PC3200 ram in his system, and is getting another 512 pc3200 stick, but from Corsair. Will they run in dual channel regardless of being from different companies, as long as they are the same speeds?

Without getting too much into details that arent really going to make a world of a difference you shouldnt run into any problems unless the mobo doesnt like the new stick.