MB will be a Supermicro X8DAL-i CPU's will probably be a pair of X5675's. Memory is 24mb DDR3 ECC RDIMM. I plan to run Ubuntu-MATE on it but wanted to check and make sure it could take full advantage of the above HW.
Yea, you shouldn't have any problem with Ubuntu on that hardware.
I have a similar system and I had a problem with the motherboards northbridge overheating because the heatsink is small and passively cooled. I'm thinking it was intended to be put into a rackmount case with a substantial amount of airflow. I ended up having to cobble together an old GPU fan to the small heatsink to keep it cool enough. Ironically, that has recently failed and the system is dead in the water right now until I find a replacement.