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Windows 7: 12GB ram only 3.99GB usable

14 May 2011   #11

windows 7 professional 64 bit

thanx ill try that now... the samsung was a shipping error. and the trancesends will be out as soon as i get the 4gb chips up and running

My System SpecsSystem Spec
14 May 2011   #12

Windows 7 64 bit SP1

As DocBrown says, you have to install memory of the same type in the same channels. Channels run 1/3 and 2/4, so when you have only two sticks installed you place them in slot 1 and 3, and when you have four, you place the 2GB's in slots 1 and 3, and the 4GB's in slots 2 and 4. Typically, most motherboards color code these slots, meaning you install the pairs in the same color slots.

Also, as DocBrown says, your 4GB's chips are from two different manufacturers. The timings look similar, but that might still cause a problem. First, put your sticks in the right slots.
My System SpecsSystem Spec

 12GB ram only 3.99GB usable

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