Question RAM compatibility problem?

Mar 24, 2020
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help me i have a motherboard it has 2 ram slots and i only got 1 ram so in my old computer i took the other ram and they have the same brand and same gigabytes also same in specification but different in tRFCmin and after i put the ram in my motherboard when i turn my pc on it start to make a sound lng beep beep beep and stop and beep beep beep again i dont know what to do