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thanks Now I see why doesn't see all but why does it only see 3.9gig and not 4gb?
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thanks Now I see why doesn't see all but why does it only see 3.9gig and not 4gb?

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Did you read my link to the other question? &nbsp;There are BIOSes, device interrupts and other hardware addresses that use up some of the available address space. &nbsp;On a system with 2GB, these would be invisible to the user.
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Did you read my link to the other question?  There are BIOSes, device interrupts and other hardware addresses that use up some of the available address space.  On a system with 2GB, these would be invisible to the user.

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We have 6 slots (3 banks), 2 bank ares pc2100 ECC ram with 512mb each. We just installed in the last &nbsp;banks 2 sticks of pc2700 2gb sticks for a total of 6gigs of ram, the board supports up to 12gigs of ram, I am stumped why bios can see all six gigs but windows only sees 3.9gigs.<br />
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Specs:<br />
Intel server board: SE7501HG2<br />
Windows: Small business Server 2003<br />
All Ram is ECC and certifed to work with the board according to intel
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We have 6 slots (3 banks), 2 bank ares pc2100 ECC ram with 512mb each. We just installed in the last  banks 2 sticks of pc2700 2gb sticks for a total of 6gigs of ram, the board supports up to 12gigs of ram, I am stumped why bios can see all six gigs but windows only sees 3.9gigs.

Specs:
Intel server board: SE7501HG2
Windows: Small business Server 2003
All Ram is ECC and certifed to work with the board according to intel

2gb to 6gb bios sees 6gb windows only sees 3.9gb

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