the server currently has a Intel Xeon E5420 with revision SLBBL and works fine. I recently purchased another E5420, this time with a revision of SLANV. As I don't have a PPM yet, I swapped it over to test if it's ok or not, but with this one in it wont boot fully (i.e. POST), with the Internal Health LED being red. Does anyone know if this revision is supported as there's no mention of it in any of the PDF's? Or is this a duff CPU?