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Windows 7: Hardware Reserved memory issue ...

11 Feb 2010   #1
SBB

Win 7 Pro x64
 
 
Hardware Reserved memory issue ...

Hi all

I'm having an issue with "hardware reserved" memory in Win 7. I followed a guide somewhere to speed up my booting when I was bored and it involved changing the number of cpus used in boot, however after I did this windows only shows 4gb of ram as usable. I undid this change but its still happening!



Can anyone help?


My System SpecsSystem Spec
.

11 Feb 2010   #2
zigzag3143

Win 8 Release candidate 8400
 
 

Quote   Quote: Originally Posted by SBB View Post
Hi all

I'm having an issue with "hardware reserved" memory in Win 7. I followed a guide somewhere to speed up my booting when I was bored and it involved changing the number of cpus used in boot, however after I did this windows only shows 4gb of ram as usable. I undid this change but its still happening!



Can anyone help?

type msconfig in search find the "max memory" and Max cpus" and uncheck them.
My System SpecsSystem Spec
11 Feb 2010   #3
seekermeister

W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
 
 

Check in the BIOS to see if you have a setting called Memory Hole. If you do, reset it (at the moment, I can't remember whether to enable or disable it).
My System SpecsSystem Spec
.


11 Feb 2010   #4
SBB

Win 7 Pro x64
 
 

@zigzag these are already unchecked

@seekermeiser I can check but i dont see why it would be working until now
My System SpecsSystem Spec
11 Feb 2010   #5
logicearth

Windows 8.1 Pro (x64)
 
 

Quote   Quote: Originally Posted by SBB View Post
Hi all

I'm having an issue with "hardware reserved" memory in Win 7. I followed a guide somewhere to speed up my booting when I was bored and it involved changing the number of cpus used in boot, however after I did this windows only shows 4gb of ram as usable. I undid this change but its still happening!

...

Can anyone help?
See, this is why you do not follow those guides that say they can speed up your boot/performance by changing these "Advance boot" options. They are only meant to disable resources for testing purposes. Altering them does nothing for performance, never has and never will in any version of Windows.
My System SpecsSystem Spec
09 Jun 2010   #6
abcxxx

windows 7
 
 

I have this exact problem fixed ! With Gigabyte p55a ud3r and Kingston KHX1600C9D3K4/8GX.

When you buy ram, you get them in pairs, as it turned out each pair/memory stick can only work on memory channel 1 or memory channel 2.

If you put a pair of memory that designed to work only on channel 1, on channel 2 (like I did unknowingly). The Bios only recognizes them, "BUT" not made available to use.
Windows 7 can only see the total ram installed (in my case 8GB), but can't make use of the other 4GB on memory channel 2, and
Windows 7 thinks the 4GB memory are "HARDWARE RESERVED".

So I advices you to switch them up between the memory slots, like I did, and now I only have 5 MB HARDWARE RESERVED instead of 4GB like before when I put the ram sticks on the wrongs slots/channel.

And now, have a joyful day !
My System SpecsSystem Spec
02 Oct 2011   #7
Harald7

Win7Pro64SP1
 
 

Had the same issue: MB: Asus P7P55D-ELX
8GB(4x2GB)installed, Bios and Win7_64 shows only 4GB, 4GB hardware reserved
Finally got it to work with 8GB:
What I did:
Power off
Clear CMOS: Short CLRT, short pin2,3:, (Not just reload defaults in BIOS), and back to Normal: short Pin1,2
Press MemOK
Power on
Delete
Now BIOS/Main/System Info: Usable Size: 8191MB (and Win7_64 reports 8GB)
Note: unless Bios shows correct size, Win wont see it.(even though CPU-Z will report it)
My System SpecsSystem Spec
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