The Team are 100% single siided MFR, never seen nor heard anything else. On the GSKill, these have to be MFR, 16GB dual sided kit with these specs usually is Hynix. Samsung B 4gbit, the only other alternative that GSkill could use, usually opt out below 2600, meaning they can?t do these specs. If you have a chance to see SN, should be typical Hynix like x400