your RAM is KIT, it will crash with other and usually RAM kit would not work with another brand of the same spec though. , just buy the same model like you had, if not will be useless.
just a suggestion AMD will be great use tight RAM high clock like your mine .. would not that be great CL7 1600?. if you want purchase get 8GB 2x4GB appropriately priced , budget arround $60 just get 1600 CL9, if u use it , keep already RAM in the box .. good luck
It is VERY rare for RAM to only work with the same exact model as the other sticks. As long as the RAM is the same speed, and preferably the same timings, it will run in 95% of he cases.