Get physical memory (GetPhysicallyInstalledSystemMemory)

[AdmiralAlkex]

http://msdn.microsoft.com/en-us/library/cc300158(v=vs.85).aspx

Minimum supported client = Windows Vista with SP1

Minimum supported server = Windows Server 2008

MsgBox(0, "Title", "GetPhysicallyInstalledSystemMemory = " & _GetPhysicallyInstalledSystemMemory())

Func _GetPhysicallyInstalledSystemMemory()
    $aRet = DllCall("Kernel32.dll", "int", "GetPhysicallyInstalledSystemMemory", "uint64*", "")
    If @error Then Return SetError(1, 0, 0)
    Return $aRet[1]
EndFunc

Okay, we are not checking the return value of the function, but I don't think it's necessary.

Edited February 15, 2011 by AdmiralAlkex

[Ascend4nt]

Nice find. The first parameter should be of type 'uint64*' however. (64-bit integer).

[AdmiralAlkex]

I don't know how I got that to int*

Code edited.

Edit: Edit

Edited February 15, 2011 by AdmiralAlkex

[guinness]

Nice, weird why this isn't in WinAPIEx.au3 but I suppose there is _WinAPI_GetPerformanceInfo() I will add this to my Function Folder

[AdmiralAlkex]

weird why this isn't in WinAPIEx.au3

Maybe Yashied still uses Win XP?

but I suppose there is _WinAPI_GetPerformanceInfo()

GetPerformanceInfo is not the same, you could say that it returns what is available for Windows, GetPhysicallyInstalledSystemMemory returns what you actually have on your motherboard.

Take my computer for example, 6GB ram, but I've it limited to 4GB due to a bugged driver, so there is only 3327MB available due to graphics card and stuff hogging the upper memory range.

GetPerformanceInfo[3] = 3488706560

GetPhysicallyInstalledSystemMemory = 6291456

On older OS you can get this with GetSystemFirmwareTable or WMI. Interesting read (do a find-in-page for GetPhysicallyInstalledSystemMemory and read a little after that).

See _ComputerGetMemory from CompInfo.au3 for WMI example.

[guinness]

OK, my mistake It makes sense now you say and after reading. Plus thanks for the website I will have a little look around the other categories

[AdmiralAlkex]

Yeah that Geoff have some cool stuff

[hackersarchangel]

Was gonna ask how this differs from MemGetStats() but I figured it out, but just in case someone else wonders:

MemGetStats() shows the reported memory amount, after what is left through sharing. So if I have 4gb of memory, but it's sharing half a gb, then MemGetStats() reports 3.5gb.

This grabs the actual installed amount. (You can correct me if I'm mistaken.)

[AdmiralAlkex]

I am not sure about the word "sharing", but yeah. GetPhysicallyInstalledSystemMemory() returns what is actually installed while MemGetStats(), _WinAPI_GetPerformanceInfo() and such returns what is usable to Windows (basically).

See post #5 too.

[AdmiralAlkex]

I just noticed (again? can't remember ) that GetPhysicallyInstalledSystemMemory was added to some time ago. I recommend everyone to check that UDF if you haven't.

[JohnOne]

I'm curious as to what the outcome of this function would be inside a VM.

[AdmiralAlkex]

I'm curious as to what the outcome of this function would be inside a VM.

If you mean whether it returns the memory of the host or the VM, then oversized screenshot (VMware Workstation) says VM.

[JohnOne]

Thanks, I ask because some time ago when you made this function I asked a few e-buddies to

test this out and a few of them came back with the result 0.

I can't remember is I found a pattern, do you know if the the function works on 64 bit, or if

any OS archs that it stumbles on?