Server2003R2 Blue Screens

I have a 2003R2 server that I have recently had the pleasure of administering.  It has been having multiple BSOD events almost nightly for months prior to my arrival.  I have since changed the RAM, and noticed that the second memory bay, when filled will cause a BSOD on start up.  I am certainly leaning towards a motherboard/hardware issue, however I have run multiple memory tests using just the 1 new stick and have received no errors.  The Dell diagnostic utility also finds no errors.

I would like to determine whether or not the Stop errors are being caused by any sort of driver/software related issue prior to replacing the entire server and or migrating it to a virtual machine.

I have attached a .zip of all recorded Stop Errors, and a copy of the most recent MEMORY.DMP.  The server does not have enough memory for a full system dump.

Any help would be greatly appreciated, thank you in advance.
Memorydump.zip
Minidumps.zip
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MorefieldITAsked:
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willcompCommented:
I analyzed the latest and 2 earlier minidumps. All point to a memory issue. Also appears to be occurring during backups -- is that what you've seen?
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MorefieldITAuthor Commented:
I did see that the ntbackup routine was running prior to crashing in the last few occurrences.  However, there were BSOD's prior to me creating the ntbackup schedule.  I created the ntbackup routine because of the nightly BSODs.

Whats interesting is that the ntbackup routine will run without error during the weekends.  It seems like the BSODs occur only during the weekdays.
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ajbarronCommented:
Is there anything that occurs on weekdays that doesnt occur on weekends? e.g different type of backup or scheduled tasks or processes?
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MorefieldITAuthor Commented:
There are no other scheduled tasks running other than the ntbackup, and it's set to run daily at 8pm.
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willcompCommented:
Check your virtual memory (page file) settings and ensure both that virtual memory is 1.5 times physical memory and that you have sufficient hard disk space.
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MorefieldITAuthor Commented:
The page file is set for 1.5 times the RAM as minimum, and up to 2.5 times as maximum for the page file.  While doing some further diagnostics last evening I got a MEMORY_MANAGEMENT BSOD and a PFN_LIST_CORRUPTION.  I believe that all of these things are leaning towards a definite Motherboard/RAM issue.
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