Z620 second processor board to fit Z640

[Budgie]

Hi I have the option to acquire a second processor board, fan and heatsink etc which has been pulled from a Z620.  Will this fit in my Z640?

[DGroves]

your question should be will the z620 2nd riser board WORK in a z640, not will it fit.........

while the board will most likely fit as i suspect the edge connector and physical size are the same ,

the BOARD WILL NOT WORK as the z620 and z640 use different family xeon processors

i would get the z620 riser board, and then sell it on ebay to help defray the purchase of the z640 riser board

[Budgie]

Many thanks for the advice.  Please can you explain in more detail as, for example, both machines are shown working with E5-2620 processors.  I am aware that the fan plugs are slightly different although still using the same four wire connections.  Why do you state they use a different family of processors? 

[DGroves]

look at the intel specs for a 2620 v2/ v3/ v4 cpu, note that they are all from different generations and have different family names The Z620 supports Intel Xeon E5-2600v1 and E5-2600v2 series processors

https://ark.intel.com/content/www/us/en/ark/products/64594/intel-xeon-processor-e5-2620-15m-cache-2-...

https://ark.intel.com/content/www/us/en/ark/products/75789/intel-xeon-processor-e5-2620-v2-15m-cache...

Z640 supports Intel Xeon E5-2600 v3 and E5-2600 v4 series processors and uses a different chipset than the z620

https://ark.intel.com/content/www/us/en/ark/products/83352/intel-xeon-processor-e5-2620-v3-15m-cache...

https://ark.intel.com/content/www/us/en/ark/products/92986/intel-xeon-processor-e52620-v4-20m-cache-...