M4A785-V EVO Not using all memory

[zjones]

M4A785-V EVO
2x Kingston KHX1333C9D3B1/4G
Win Vista 64 Ultimate

Bios and Windows Properties says 8GB
Task Manager only shows 4GB

what other info can i give to help diagnose ?
&
what am i doing wrong ?

 

[Dereck47]

Are you positive you're reading Windows Task Manager correctly?

On the "Performance" tab there's a section on the bottom left that says "Physical Memory (MB)". What's the number listed next to "Total"?

Also make sure that your memory sticks are installed in slots DIMM_A1 & DIMM_A2 (page 1-11 of your motherboard manual).

 

[zjones]

I was always told a picture is worth a thousand words,

Memory in Slots 1 and 3 (A2 and A1)

I have also run the Vista Memory Diagnostics Tool (on highest setting on 2 pass) - PASS NO ERRORS

help me obi-wan, you're my only hope

 

[Dereck47]

Your 2nd memory stick should not be in slot 3. It should be in slot 2.

 

[zjones]

tried in both slots a1,b1 (blue) and a2,b2 (black), identical results to the above, are there any BIOS settings I should examine ?

 

[Dereck47]

Only other thing I can think of is to re-run WEI (Windows Experience Index).

 

[zjones]

updated cpu-z once memory in correct slots

will try your suggestion

 

[zjones]

Only other thing I can think of is to re-run WEI (Windows Experience Index).

no effect

 

[Dereck47]

Sorry, don't know what else to suggest. Hopefully other Forum members will be able to resolve your issue.

If no one else can help maybe try a fresh install of Windows.

 

[alyoshka]

Try going to the Windows Start Menu-Control Panel-Administrative Tools-System Configuration.
In that go to Boot-Advanced Options
Un-Check Maximum Memory if it is checked and shows a value there.
Then run Windows Experience Index Again and post the results here again.

 

[zjones]

unchecked max memory
rebooted
came back with 8gb in task manager

excellent, thanks SOLVED

next question, why did I need to tell the OS not to use the maximum memory to be able to use the maximum memory ?

 

[alyoshka]

It's called a Computer...... According to Charles Babbage..... Garbage In = Garbage Out...
That's why it needed that little nudge to tell it to use all the available RAM.....