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Activity Monitor only showing 4GB of 8GB RAM

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surfazer

surfazer

Joined
Feb 3, 2011
Messages
13
Motherboard
MacBook Pro M1 13"
CPU
M1
Graphics
M1
Mac
  1. MacBook Pro
Hello,

i would be very happy if somebody yould help me. I've done everything i could find about it.
The Activitymonitor shows only 4GB from 8 and the system only uses this much RAM, because my Parallels Win7 Installation and Mac hangs up if i set 4GB as virtual RAM-> then Activity Monitor shows 0 RAM free.
I set the following in the boot-file (/Library/Preferences/SystemConfiguration/com.apple.Boot.plist):
.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Kernel Flags</key>
<string>arch=x86_64</string>
<string>maxmem=8192</string>
</dict>
</plist>

I also changed the System to use EFI 64 for using 64-bit kernel:
The Command "ioreg -l -p IODeviceTree | grep firmware-abi" shows:
| | "firmware-abi" = <"EFI64">

I also did using the following command:
sudo nvram boot-args="arch=x86_64"

So everything is set for booting the 64-bit system and kernel.
Everywhere else the system is showing 8GB RAM.
Has someone an idea what i could try else?
I use Multibeast with special DSDT-MSI-P55-GD80.aml -file.
My Mainboard is a MSI P55-GD80 board. Everything is working except this RAM issue.

Thanks for your suggestions!
Peter
 
Re: Activity Monitor only showing 4GB from 8GB RAM

surfazer said:
Hello,

i would be very happy if somebody yould help me. I've done everything i could find about it.
The Activitymonitor shows only 4GB from 8 and the system only uses this much RAM, because my Parallels Win7 Installation and Mac hangs up if i set 4GB as virtual RAM-> then Activity Monitor shows 0 RAM free.
I set the following in the boot-file (/Library/Preferences/SystemConfiguration/com.apple.Boot.plist):
.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Kernel Flags</key>
<string>arch=x86_64</string>
<string>maxmem=8192</string>
</dict>
</plist>

I also changed the System to use EFI 64 for using 64-bit kernel:
The Command "ioreg -l -p IODeviceTree | grep firmware-abi" shows:
| | "firmware-abi" = <"EFI64">

I also did using the following command:
sudo nvram boot-args="arch=x86_64"

So everything is set for booting the 64-bit system and kernel.
Everywhere else the system is showing 8GB RAM.
Has someone an idea what i could try else?
I use Multibeast with special DSDT-MSI-P55-GD80.aml -file.
My Mainboard is a MSI P55-GD80 board. Everything is working except this RAM issue.

Thanks for your suggestions!
Peter
Click to expand...
Are you still booting with iBoot?
 
Re: Activity Monitor only showing 4GB from 8GB RAM

Yes i do. Is there a limitation in iBoot?

If yes, what could i do alternatively?
 
HCK
GA-Z87MX-D3H |  i5 4670K |  GeForce GTX 770
HackMini - NUC
Other |  i3 3210 |  HD 4000
Re: Activity Monitor only showing 4GB from 8GB RAM

surfazer said:
Yes i do. Is there a limitation in iBoot?

If yes, what could i do alternatively?
Click to expand...
Install chameleon bootloader for ATI to match your graphics card from MultiBeast.
Repair permissions and rebuild caches.
Reboot.
 
Thanks for your suggestions.
I read all informations and tried the installation with EasyBeast and Chameleon Bootloader for ATI (Going Bald) and also the Installation for ATI Graphics on the screenshot from the link you suggested. (YoYellow)
But with these suggestions i can only boot in 32-bit modus. And therefore it's not possible to use the full 8GB RAM. Or am i wrong?
The only possibility to run complete 64-bit mode is to use the MS P55-GD80 DSDT...
Is it generally possible to have access to 8 GB RAM? That's not very clear to me.
Thanks for further help!
Peter
 
I had the exact same problem, with parallels and all, once you get booting without iboot check to see if your still only showing 4gigs in activity monitor, if so, the solution I found was putting my ram in the first 2 dimm slots, so they are side by side with no spaces, even though my mobo manual says they will better preform with a space, that's what did it for me
 
Hi Robe5000,
i have all 4 slots set with 4x2 GB Kingston RAM. So that's no solution for me.
Thanks for the answer.
I tried now with DSDT-MSI-P55-GD80.aml -file and Chameleon 2.0 RC5 ATI Experimental bootloader and 64-bit Apple Boot Screen option.
The system boots, but still only 4GB RAM.
 
hmmmm, are all 4 banks showing memory status as ok?

menu/about this mac/moreinfo/memory
 
Yes they're correctly detected. All 4 the same 2GB Kingston memory.
 
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