My motherboard supports 4GB and it used to work, but now as I plug in each stick, as soon as I plug in the third I start loosing huge amounts of "efficiency" or something. If I plug in any one of the four 1GB sticks, it shows 1GB in BIOS (tested) and in windows.
If I plug in any 2, it shows 2GB. As soon as I plug in any 3rd stick, it shows as 2.75GB in BIOS, and the 4th brings it to 3.5GB in bios (only 2.75GB in windows). What should I replace, software? hardware? If the latter, RAM, motherboard? I have not run memtest 86.
4GB ram becomes 2.75GB ?
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Re: 4GB ram becomes 2.75GB ?
Do they all have the same specs? Are you plugging them into the correct slots? What does the motherboard's documentation say about memory? Are you using onboard video, which will reserve some of that memory for itself? What changed from the time before when you had 4GB and now?