At this point the information is not handy for me but let me research and I will be right back with you as soon as possible.
You can refer to this URL for information:
Check on page 15 and page 18, they contain information on the EU's. Basically an EU is a sub-section of the processor that splits process information using an even further sub-section of "threads". The listed information on page 18 states that an Ivy Bridge processor can have 16 EU's on it, each with 8 threads of their own for processing/sub-processing.