A x124 error is typically hardware related. Since it's a server machine I presume it's not overclocked. Some system specs such as motherboard and what RAM would also be helpful.
I'd start by testing your memory with memtest86+
Unless it shows errors straight away, let it run for several passes at a minimum (run overnight is better). If there are errors it could be as simple as incorrect timings/settings, a faulty module or even a bad dimm slot. If there are no errors the focus can be shifted elsewhere.