This message was posted on behalf of Intel Corporation
In regard to your question, the instructions set for the E7-8891v2 are the following:
You can confirm that information on the following link:
And the inquiry about which boards are compatible with the processor, I just wanted to let you know that this is a tray processor, and that type of processors are sold to specific manufacturers so they can build their products, normally the processor will be found on systems build by them, and most of the times you will not find this processor sold separately.
Besides that, Intel did not manufactured a motherboard for this processor, that is why there is no a list of compatible boards for it, and in order to find out which products are working with this processor you will need to verify that with different manufacturers like for example Supermicro to find out if they have a product where this processor is included.
NOTE: These links are being offered for your convenience and should not be viewed as an endorsement by Intel of the content, products, or services offered there.
Any questions, please let me know.