win 7 64 bits sees 3.98gb usable of 8gb of memory.

[gusther]

I built a pc with an amd 8150 in a gigabyte 990fxa-ud3 with 8GB of memory and only sees 6gb with 3.98gb usable

 

[Durvelle27]

do go into the BIOs and disable video memory share

 

[gusther]

there is no video memory share function, there is ganged and unganged for enable dual channel but do nothing in the two ways

 

[zebrax2]

Msconfig - boot tab - advance options - uncheck maximum memory

 

[gusther]

I checked maximum memory and had 6144 mb, but I changed it in every way possible and nothing happened

 

[ShintaiDK]

Try check the bios for mempry mapping or something similar of PCIe resources. And try see if there is a BIOS update.

 

[gusther]

there is a bios update but is beta. I don't know.

 

[gusther]

and nothing about memory mapping

 

[sb.0326]

I had a similar issue and for me it was "Memory Hole Remapping". Least if I'm remembering correctly..

 

[LoneNinja]

Just to clarify, you've installed 8Gb of RAM, the system sees 6Gb installed but only 3.98 is usable?

Is this a 4 x 2Gb kit of RAM? I had a similar situation where my system only detected 6Gb of the 8Gb I installed because one of my motherboards RAM slots were dead.

Have you varified each stick of RAM and each slot on the motherboard is working? Once we know the RAM and motherboard work fine we should be able to isolate it to a windows/software problem of some sort.

 

[fastamdman]

Open up task manager and go to the performance tab, what does it say under physical memory total?

 

[tcsenter]

I checked maximum memory and had 6144 mb, but I changed it in every way possible and nothing happened

You changed it every way possible including just unticking the check box, then restarting?

 

[KingFatty]

Sometimes the memory module is not fully seated in the motherboard. But it's in just enough to show up as detected, but not usable.

So just do a quick check by re-seating all the RAM, see if any are a little off and take them out and re-insert them. Hopefully then all 8 GB will show up as usable.

 

[gusther]

problem solved was the memory slots change them again to slots 3 and 4 and now again recognizes the 8 gb, with 5.25 gb usable. I have to know what happened with slots 1 and 2

 

[AnitaPeterson]

problem solved was the memory slots change them again to slots 3 and 4 and now again recognizes the 8 gb, with 5.25 gb usable. I have to know what happened with slots 1 and 2

The problem isn't really solved, if the machine can only use 5 GB out of 8... am I missing something here?

 

[Ketchup]

Sounds like the on-board video is using the rest.