Parity Check / Memory Parity Error

Have a new Dell Optiplex 380 and it is giving me a memory parity error at startup on blue screen.  Screen actually states:

Hardware failure
Parity check / memory parity error

I've done many troubleshooting steps to no avail.  Here's the findings so far.

Have five machines exactly alike in the office, so I was able to switch out the following items with KNOWN GOOD items from other functioning machines just like the problematic one.  Also, I must mention that the machine will come up in SAFE MODE.  Will not come up in SAFE MODE WITH NETWORKING or any other mode...only safe mode.  I've switched out:

Memory
Video Card
Keyboard
cmos battery

I also did the following:

Set bios to default, booted to safe mode and loaded anti-malware and scanned for malware (nothing), disabled most startup items, etc.

Any other ideas???
mjoinerAsked:
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_Connect With a Mentor Commented:
Assuming an onboard nic, try disabling that in the BIOS, and see what happens.
If it stops the BSOD, try using an PCI nic.

If no joy that way, try turning off the other onboard components that are not needed to boot the system, and add them back one at a time until it hangs again.
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sevlahptCommented:
Hello.
Can you try your HDD in other computer to check if the problem goes to the other computer?
If not, i would say you have a Motherboard problem.
Hope it helps.
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mjoinerAuthor Commented:
Any other suggestions?
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_Commented:
At this point, it looks like a problem with the PSU, CPU or Motherboard.
I'm leaning toward mobo, but you can try a PSU and CPU from one of the working systems to make sure.
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mjoinerAuthor Commented:
I will try these things and get back.
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mjoinerAuthor Commented:
It ended up being the onboard NIC.  Great job in answering this.  Dell had to send out another motherboard that we installed and all is well. Thanks
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_Commented:
Thanks for the Points and the feedback.   : )
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