G.Skill EXPO ULL memory. G.Skill’s AMD EXPO ULL (Ultra Low Latency) memory kits, strong contenders among today's best RAM options, have arrived on the retail market. While AMD previously stated that EXPO ULL memory kits would be “effectively the same price” as vanilla EXPO memory kits, this has proven by far not to be the case. In reality, these new EXPO ULL kits carry a substantial premium that can scale up to 80% over their regular counterparts.