Looking at the files, it is possible that your CPU (Intel® Xeon® E5450) can’t “access” all 64-bit specifications. These limitations often come from outdated BIOS or from outdated motherboard chipset drivers.
Unfortunately, your BIOS didn’t receive further updates since 2011, which is also the date of the version you have now. Your motherboard chipset drivers seem to date back to 2009 though - please make sure there isn’t a more recent version available on manufacturer’s website (you can either use the automatic update feature or you can look for your chipset model).
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