Guide to Intel(R) Xeon(R) Processor 5500 Series Mechanical Model (Doc 321326)

3 assembly families: 1U heatsink, 2U heatsink, Tower heatsink
3 CAD formats: IGES, ProE, STEP 
3x3 = 9 files

Here is the file list:
1. 1U Nehalem EP EC Stack - IGES.zip
2. 1U Nehalem EP EC Stack - Shrinkwrap.zip
3. 1U Nehalem EP EC Stack - STEP.zip
4. 2U Nehalem EP EC Stack - IGES.zip
5. 2U Nehalem EP EC Stack - Shrinkwrap.zip
6. 2U Nehalem EP EC Stack - STEP.zip
7. Tower Nehalem EP EC Stack - IGES.zip
8. Tower Nehalem EP EC Stack - Shrinkwrap.zip
9. Tower Nehalem EP EC Stack - STEP.zip

Each file has an assembly (asm) that contains board, socket, backplate, ILM, processor, TIM and heatsink.
Each file has a separate keepout model that is not part of the assembly. 
