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Windows 7: Half of memory is not usable - Please help me understand where it is

28 Apr 2011   #31
Mike Connor

Several, including Windows 7 x64 Ultimate
 
 

Quote   Quote: Originally Posted by pendraggon87 View Post
Quote   Quote: Originally Posted by Mike Connor View Post
The problem is the RAM configuration. The only way that much RAM is "Reserved" is if Windows can see it but can't use it.

This was also a recent problem with the same thing;

8gb Installed Ram - Only 3.74 Usable (HELP!)

Regards....Mike Connor
What is not configured properly? It is using default settings - I did not mess with the BIOS, RAM is properly seated.
The fact that Windows can see the RAM, but is unable to use it, indicates an unsupported RAM configuration. That usually means you have the wrong RAM sticks.

Regards....Mike Connor


My System SpecsSystem Spec
.
28 Apr 2011   #32
pendraggon87

Windows 7 x64 Professional
 
 

Quote   Quote: Originally Posted by Mike Connor View Post
Quote   Quote: Originally Posted by pendraggon87 View Post
Quote   Quote: Originally Posted by Mike Connor View Post
The problem is the RAM configuration. The only way that much RAM is "Reserved" is if Windows can see it but can't use it.

This was also a recent problem with the same thing;

8gb Installed Ram - Only 3.74 Usable (HELP!)

Regards....Mike Connor
What is not configured properly? It is using default settings - I did not mess with the BIOS, RAM is properly seated.
The fact that Windows can see the RAM, but is unable to use it, indicates an unsupported RAM configuration. That usually means you have the wrong RAM sticks.

Regards....Mike Connor
If they are "wrong" then shouldn't it not recognize ANY of the RAM, and not just half of it? How do I find out if the RAM i posted above is compatible? As far as I know it should be.
My System SpecsSystem Spec
28 Apr 2011   #33
Mike Connor

Several, including Windows 7 x64 Ultimate
 
 

Quote   Quote: Originally Posted by pendraggon87 View Post
Quote   Quote: Originally Posted by Mike Connor View Post
Quote   Quote: Originally Posted by pendraggon87 View Post

What is not configured properly? It is using default settings - I did not mess with the BIOS, RAM is properly seated.
The fact that Windows can see the RAM, but is unable to use it, indicates an unsupported RAM configuration. That usually means you have the wrong RAM sticks.

Regards....Mike Connor
If they are "wrong" then shouldn't it not recognize ANY of the RAM, and not just half of it? How do I find out if the RAM i posted above is compatible? As far as I know it should be.
Read the thread I linked to. The problem was identical, and it was caused by using an unsupported RAM configuration. That means the RAM doesn't work properly.

The motherboard manufacturer should have a list of supported RAM types.

You MUST use a supported RAM type, as others simply wont work, even though Windows can see them.

"It should be" is not good enough. It MUST be compatible, or it wont work properly.

Regards....Mike Connor
My System SpecsSystem Spec
.

28 Apr 2011   #34
logicearth

Windows 10 Pro (x64)
 
 

Quote   Quote: Originally Posted by pendraggon87 View Post
There is no option in the BIOS. Additionally, it is strange that always half of the RAM is reserved. I understand remapping memory from the graphics card, etc, but why is it always half of the RAM being reserved - where is it going that it would need to be remapped? It seems strange that boards will ship without a BIOS that allows memory remapping and yet boast being able to hold over 16GB of RAM...
Then you need to go talk to MSI about it.
Without memory remapping it won't matter.
Further more there have been several BIOS updates for your board.
My System SpecsSystem Spec
28 Apr 2011   #35
Mike Connor

Several, including Windows 7 x64 Ultimate
 
 

Quote   Quote: Originally Posted by pendraggon87 View Post

If they are "wrong" then shouldn't it not recognize ANY of the RAM, and not just half of it? How do I find out if the RAM i posted above is compatible? As far as I know it should be.
No. What happens in a lot of cases is exactly what is happening to you. Windows can see the RAM, but it is unable to use it, because the configuration is unsupported, and Windows marks what it can't use as "Reserved Hardware".

It is not being used for anything else, it is simply unusable.

The actual reason(s) why it doesn't work is irrelevant here, there can be lots of reasons. You need to find RAM that works on your board.

Regards....Mike Connor
My System SpecsSystem Spec
28 Apr 2011   #36
pendraggon87

Windows 7 x64 Professional
 
 

Quote   Quote: Originally Posted by Mike Connor View Post
Quote   Quote: Originally Posted by pendraggon87 View Post
Quote   Quote: Originally Posted by Mike Connor View Post

The fact that Windows can see the RAM, but is unable to use it, indicates an unsupported RAM configuration. That usually means you have the wrong RAM sticks.

Regards....Mike Connor
If they are "wrong" then shouldn't it not recognize ANY of the RAM, and not just half of it? How do I find out if the RAM i posted above is compatible? As far as I know it should be.
Read the thread I linked to. The problem was identical, and it was caused by using an unsupported RAM configuration. That means the RAM doesn't work properly.

The motherboard manufacturer should have a list of supported RAM types.

You MUST use a supported RAM type, as others simply wont work, even though Windows can see them.

"It should be" is not good enough. It MUST be compatible, or it wont work properly.

Regards....Mike Connor
According to the motherboard specifications, it is dual channel DDR3 1066/1333/1600*/2000*/2133* (OC). http://www.msi.com/product/mb/P55-GD65.html#?div=Basic

According to the Gskill website, the first type of RAM I have, Ripjaw, is guaranteed to work with MSI P55 GD65. G.SKILL-Products

The other set of RAM I bought, F3-10666CL9D-4GBNS, looks like it might not be meant for my mobo. However, that does not explain why the issues were occurring with the first set of RAM.
My System SpecsSystem Spec
28 Apr 2011   #37
pendraggon87

Windows 7 x64 Professional
 
 

Quote   Quote: Originally Posted by logicearth View Post
Quote   Quote: Originally Posted by pendraggon87 View Post
There is no option in the BIOS. Additionally, it is strange that always half of the RAM is reserved. I understand remapping memory from the graphics card, etc, but why is it always half of the RAM being reserved - where is it going that it would need to be remapped? It seems strange that boards will ship without a BIOS that allows memory remapping and yet boast being able to hold over 16GB of RAM...
Then you need to go talk to MSI about it.
Without memory remapping it won't matter.
Further more there have been several BIOS updates for your board.
I used the MSI LiveUpdate 5 tool to update my BIOS to 1.10, which it said was the latest.
My System SpecsSystem Spec
28 Apr 2011   #38
Mike Connor

Several, including Windows 7 x64 Ultimate
 
 

Quote   Quote: Originally Posted by pendraggon87 View Post
Quote   Quote: Originally Posted by Mike Connor View Post
Quote   Quote: Originally Posted by pendraggon87 View Post

If they are "wrong" then shouldn't it not recognize ANY of the RAM, and not just half of it? How do I find out if the RAM i posted above is compatible? As far as I know it should be.
Read the thread I linked to. The problem was identical, and it was caused by using an unsupported RAM configuration. That means the RAM doesn't work properly.

The motherboard manufacturer should have a list of supported RAM types.

You MUST use a supported RAM type, as others simply wont work, even though Windows can see them.

"It should be" is not good enough. It MUST be compatible, or it wont work properly.

Regards....Mike Connor
According to the motherboard specifications, it is dual channel DDR3 1066/1333/1600*/2000*/2133* (OC). http://www.msi.com/product/mb/P55-GD65.html#?div=Basic

According to the Gskill website, the first type of RAM I have, Ripjaw, is guaranteed to work with MSI P55 GD65. G.SKILL-Products

The other set of RAM I bought, F3-10666CL9D-4GBNS, looks like it might not be meant for my mobo. However, that does not explain why the issues were occurring with the first set of RAM.
Presumably, the main idea right now is to get your machine running properly. In which case, what previous issues various components may have had is also irrelevant. Just forget about them, and try to obtain RAM which works.

Nothing else will help, you can't remap it , or use software to "repair" it, or anything like that if it is an "Unsupported Configuration". The fact that Windows can see the RAM, but marks it as "Reserved Hardware" confirms this, Windows is telling you that it can not use the RAM. The only thing you can do is find RAM that works.

If you have bought RAM from a firm that guarantees it will work, then there is no problem, because it obviously does not, and you can simply return it.

Regards....Mike Connor
My System SpecsSystem Spec
28 Apr 2011   #39
stormy13
Microsoft MVP

Win 7 Ultimate x64
 
 

Just for fun, have you tried loosening off the heatsink yet?
My System SpecsSystem Spec
28 Apr 2011   #40
gpost3

Ubuntu 10.10 64 bit/Window 7 VM
 
 

I agree with stormy that this is not OS issue.

Quote:
Additionally, the heatsink I used is a monster of a heatsink, shouldn't have listened to a friends recommendation on that.
I have always used Intel and smaller Arctic Cooler heatsink fans with 0 problems. Since I don't overclock, I never buy monster heatsinks and tend to stay away from MSI/Gigabyte/Asus motherboards because their BIOS is blotted with OCing features. I have used ECS boards with very good success - granted they have less features in BIOS but what little it does - does well and quite stable of a motherboard in my opinion. You don't really need that monster heatsink unless you plan to OC (mainly for games).

Quote:
Just for fun, have you tried loosening off the heatsink yet?
Try that.

And try running the RAM on single channel mode? Another thing that beats me is according to OP, MemTest86+ is able to see and test all 4 GB of RAM. My suspicion goes towards your CPU (being improperly seated or damaged or whatever) and then to your motherboard.
My System SpecsSystem Spec
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 Half of memory is not usable - Please help me understand where it is




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