Usable vs. Installed RAM

[foogama]

I have 6 gigs (2gigs x 3) of 1600 DDR3 Triple Channel RAM installed, but Windows 7 build 7077 64-bit is only saying that 4 are "usable" (see attached)

http://filebox.vt.edu/users/brice85/Memory.jpg

BIOS and CPU-Z show 6 gigs are installed, how do I make the remaining 2 gigs usable?

Gigabyte GA-EX58-Ud5
i7 920 w/ Monsoon III
6G DDR3 1600 OCZ Gold RAM
120G OCZ Vertex SSD
Windows 7 build 7077 64-bit.

 

[mcnuggetofdeath]

never having messed around with a 64 bit system i cant speak from first hand experience, but perhaps the rest is simply being used to cache data from various applications. Vista implemented pre-fetching to speed up responsiveness. What does it say about your memory total/available in the task manager.

 

[foogama]

In task manager is reports 4gigs total: 1.6 gigs cached, 2.5 gigs available, and .95 gigs free.

 

[boonality]

I wish I could help but I am running Win7 in a VM with 2gb available to it, my host OS is Vista x64 with 8gb of memory. The first thing to look at though is just the properties of your "my computer" called computer now. It's a good starting point.

 

[mindless728]

ill see if i have the same problem, ill load up a VM with 6GB for w7 64bit

 

[rand_79]

well id say its a beta OS problem if i was guessing.

i run vista 64bit with 8gig and it works correctly.

 

[ahnilated]

It has to be a beta OS issue because I have Vista 64 bit with 12G ram also and it all shows.

 

[jassao]

I had the same problem and a bios update fixed it for me.

 

[mindless728]

all 6GB shows up in the VM

 

[foogama]

I have the latest bios version (updated before i installed the OS) on my Gigabyte GA-EX58-UD5, all of the RAM in all three slots show up in the bios. I had the same issue when I originally installed build 7057 and was hoping that upgrading to build 7077 would solve it, but didn't.

Thanks for everyone's help and experimenting thus far. I will re-flash the BIOS and see what that does.

Ahnilated, do you have triple channel DDR3 1600 RAM by chance? Because I'm considering upgrading to 12 via 3 more 2gig sticks to see if that does it.

 

[Scotteq]

Check your memory mapping settings in the Bios - It should be enabled. If it is, then disable and re~enable

 

[foogama]

I don't see any "mapping" settings in Bios, nor the option to disable or enable it. The only options I could find for memory in BIOS were the SPD and voltages.

 

[Scotteq]

I assure you, it's there - Check your manual. The last Gigabyte board I had used a function key to get into the advanced settings...

 

[mamw93]

Windows 7 BETA may only do 4GB. No matter x86 or x64. But I really don't know what to tell you.