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4GB but AM only showing 3.75GB

S

statofmotion

macrumors member
Original poster
Nov 16, 2008
39
0
I was checking out my Activity Monitor the other day and I have noticed this before. I have 4GB in my MacBook Pro and updated to SL and now AM is only showing that I have 3.75GB:confused:

I figured maybe it was just an error and I have shut my MBP off and it still hasn't changed. Any ideas why it is saying this?
 
I have 6GB in my '09 15" MBP, she's reading 3.75GB under the little pie chart, but when I add up Active, Inactive, Wired, and Free, it comes to ~6GB (slightly over). I'm not entirely sure what the problem could stem from.


(Note: I'm running in 32-bit kernel)
 
So after upgrading to SL this would happen? It wasn't like this before and always read 4GB; Ive never change to the 9600 either:confused:
 
If I'm not mistaken, SL now is using base 10 for defining storage space so I'm going to assume the are using the same method for calculating RAM. This is the same as the manufacturer's where 1GB = 1000MB as opposed to the old method where 1GB = 1024MB.

Good 'ol base 2 vs. base 10 debate...
 
Mine shows the full 4GB on SL. Hmm.
 

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Bostonaholic said:
If I'm not mistaken, SL now is using base 10 for defining storage space so I'm going to assume the are using the same method for calculating RAM. This is the same as the manufacturer's where 1GB = 1000MB as opposed to the old method where 1GB = 1024MB.

Good 'ol base 2 vs. base 10 debate...
Click to expand...

Would this really apply? I don't think anyone has actually used base10 math for counting RAM. 4GB of RAM has always been 4096MB of RAM ... right?

If SL uses base10 math for RAM, then it should show up as 4.3GB.
 
Kalison said:
Mine in SL only shows 3.75 as well. I know in Leopard it does show 4.
Click to expand...

Leopard shows the full 4GB but 256MB of it is permanently Active and assigned to the 9400M.

In Snow Leopard the Activity Monitor only shows the actual available RAM.

Same same but different.
 
Wow, thanks for the replies. Good to know everything is good though. Very strange but everything still works the same so I can't complain. :)
:apple:
 
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