Mac pro put in new ram now none of the ram works

mac pro put in new ram now none of the ram works
it just hangs on restart
the ram worked great for 12 hours then the computer restarted on its own
since then it hangs on restart and never gets to the desktop

It may not have anything to do with the RAM, or it might.
Not enough to go by to say for certain, and the blunt "get new RAM" doesn't address how to troubleshoot or resolve most likely.
Was it installed properly?
How much did you install?
Make? vendor.
Try running with just the new RAM.
Run Apple Hardware Test - boot 'd' key on startup, you may need your OEM Install DVD.
Run Rember and/or Memtest utility to test memory, or TechTool Deluxe.
When a computer restarts on its own it often means there was a kernel panic or something and damage to files, directory, journal and in need of repair, booting off your DVD or another drive to repair the drive, delete some files, turn journaling off and then on.
http://docs.info.apple.com/article.html?artnum=106227
http://www.macmaps.com/kernelpanic.html
http://www.thexlab.com/faqs/kernelpanics.html

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Mac pro put in new ram now none of the ram works

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