Does the machine boot? I couldn't tell from the message but I'm assuming it does and you've checked the ram via the system. You should obtain SysInfo or a similar pgm from Aminet to tell you what speed and processor you've got. There were accelerator options for the 500 that were placed directly on the motherboard. Most 2000s were accelerated via a Zorro card or the accelerator slot.
Good luck with your new machine!