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I have a Acer Aspire TThe data sheet for it is https://www.acer.com/datasheets/2014/4871/TC-120/DT.SV8AA.005.htmlIt has 4 storage slots and 3 of them space filled through 4GB 1Rx8 PC3L-12800U-11-13-A1I have actually a few questions about filling the fourth slot. 1) carry out I have actually to match what is already there exactly? can I include an 8g stick. Or execute I need to complement the rod in pairs?What around the rest of the numbers.1Rx8 PC3 12800UDo I need to complement the 12800U.I witnessed a 12800R. What is the U an R?How around the 11-13?I observed a couple of 11-12s what is the 12 vs the 13?
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1) not necesarily, however it is recommended that you match what you currently have. Storage sticks have the right to work in pairs for extr speed, or they have the right to work as single sticks, which is slower. If you have an even variety of sticks, they will shot to occupational in pairs, and if they room mismatched, that can lead to problems (system instability and such). You could add an 8 GB stick, yes, but it\"s unlikely that you will need it: you already have 12 GB, which is a same amount; 4 GB more brings you to 16 GB, i beg your pardon is claimed to be the present sweetspot, although you really should stress your computer to gain the used memory close to that. I would certainly recommend one more stick that 4 GB through the specific same specs as the others.2)\"1Rx8\": one heat of 8 chips: some memory sticks have chips on simply one side of the circuit board, others on both sides. Part have more chips, part less.3) The \"U\" represents \"unbuffered\", or non-registered: it way it\"s not a server-grade memory, it lacks some attributes that are required for servers (but nothing to worry around for a laptop)4) \"11-13\": those are timings: in the storage sticks, operations space done, favor reading this memory, writting the one, etc. Each procedure requires part time, and those timings are shown by those numbers. The reduced the numbers, the better, as it way it takes much less time to do a given operation.More details here: https://en.wikipedia.org/wiki/DDR3_SDRAMAnd that should cover it, hope it helps!