yeah, i understand that....:(
I'm trying to figure that out...
Do you have an old processor on you that might have been in the rig?
Have you tried to Clear the BIOS and start from scratch, but, this time, make sure you are using the bare minimums, only, one processor in Slot 1 the second slot should be empty.
The four RAMs in the slots I specified earlier.
Please read this:
Try to install each CPU in single mode operation and see if both of them works.
The board supports one or two Intel (R) Xeon Processors 5000 sequence.http://www.intel.com/support/motherboards/server/sb/CS-022346.htm
Not all boards or systems support the Intel® Xeon® Processors 5400 and 5200 processors. Refer to Support for Intel® Xeon® Processors 5400 and 5200 to ensure you order the correct product.
If you are using a non-refresh board, then any 45nm CPU is not meant to be officially supported on the non-refresh board.
If your board is a non-refresh board, then only 65 nm cpu worked fine on it.
A non-refresh board will not have a letter 'R' at the end of the naming.
Example: S5000XVNSAS, S5000XVNSATA
A refresh board will have the letter 'R'
Example: S5000XVNSASR, S5000XVNSATAR
Now regarding the population for the CPU, refer to the documenthttp://download.intel.com/support/motherboards/server/s5000xvn/sb/s5000xvn_tps_rev_1_3.pdf