FibreCat N20i (with D1979mb) CPU compatibility question.

[carukc]

Hello,

I have several FibreCat N20i servers that I would like to start using to test Windows 2008 R2. Unfortunately they came with Intel 530 CPUs, which are x32 only. I have a number of 820s around, which will fit the 775 socket but I am not sure about compatibility.

Does anyone know where I might find a CPU compatibility guide for the D1979 motherboard or alternately if through experience it is compatible with an Intel 820 CPU?

Thanks for the help.
Chris