條ram雙面都唔等如係dual rank, 現時市面一條8gb通常single rank, 一條16gb可以係single或dual rank.
Single rank係易超少少因為controller workload比dual rank少
打機的話dual channel配dual rank比較好.
eg: 8gb (single rank) x 4 or 16gb (dual rank) x 2
之後rank再多都無用同可能令controller overload慢咗, 因為除server/workstation板好少支援多過dual rank.
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