12gb ram installed only showing as 8gb

Queen Jackie

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Apr 26, 2017
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We have a gigabyte FGA85X-UP4 motherboard. We had 8gb of ram and installed another 4gb the other day but only 8gb shows in windows 7. Speccy shows 12gb installed. What can be our problem here? He put the ram in as follows; The first 4gb stick is in the fourth slot then empty slot then the new 4gb in the third slot and other 4gb in fourth slot (slot closest to the CPU Heatsink. Are we doing it wrong? Also noticed that the computer slowed down a bit after installing new ram. It seems to me it is doing the opposite than it's suppose to! Can someone please help us out here? Do we need to update Bios or what do we need to do. Frustrated!
 

derekullo

Distinguished
I'm assuming you meant Gigabyte GA-F2A85X-UP4

Having 2 dimms in dual channel and a single dimm in single channel could potentially have a slightly negative performance impact when accessing data held on the single dimm
 

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