Well, i would say if the system boots on the first socket CPU1 without any problem and both CPU work fine on the VSA board, it can be that the second socket CPU2 on the XVN is faulty.
Try the system with a minimum configuration and see if it works at least. (dual memory, dual cpu)
Note: Since you are not using a compatible chassis which comes with a compatible Power supply, it is a bit difficult for me to guarantee that the board is faulty.
So i bet you will need to check your PSU datasheet and board datasheet requirement as well as a precaution.
All the best,
Also remember that different stepping codes may not be supported by the server board. In this case please check the box of each processor and look for a number that looks like the following "SLXXX", both processors must have the same number. If you do not find this in the box check in the processor itself. I understand this may not be the case since they work fine in the VSA board but please double check.
I would also check this 8-pin connector that you have from the power supply, it may the one used for PCI-Express video cards and not exactly the one needed fot he processors.
Also, when having the two processors in the board, if you start the system without any memory... do you receive any beeping codes?
Thanks for the reply,
the cpus are matched, same stepping.
I am thinking it maybe the psu, even though its 1000 watt, I have tried taking all the memory out and it makes no beeps at all, only when i use 1 processor does it beep indicating no ram, when i put both in nothing happens, but it is strange that the psu is ok with vsa and not xvn board.
had a similar problem with Coolermaster Power supplies, Coolermaster 850 Watt and Coolermaster Silent ProM 1000Watt, no boot, system hangs on boot. Antec True Power 850 Watt did the trick.....
Coolermaster explains: Cooler Master’s Real Power series includes a soft-start circuit design that safe-guards the power supply unit and your hardware from power spikes when you turn it on. Due to this safe-guard mechanism, it usually takes the power up to 15-20ms to reach the motherboard. With MSI motherboards based on Intel’s P35 chipset and later models, power needs to be detected within 12ms. This lag in duration has resulted in the power not being detected and the motherboard is therefore unable to power on your system. More on soft-start technology: http://en.wikipedia.org/wiki/Soft_start