Well, first of all samburg made the whold 7900 series bad because of there crappy ram. Also samburg doesn't make the ram there just a lable holder. Othe manufactinjg companies do. Samburg put a stick on there cheap ram and hope someone buy it and hates it.
there find your fav ram and see that they use samsung chips. the other makers that were posted above are the ones that put the chips on a pbc and put a label on it.
Samsung is not the only chip maker but they are the high end one.