Paul,
It can be a little confusing.
The C210 has the following slots available:
5 Standard Height PCIe Slots (versus Low Profile "LP" which are found in the C250)
The speed of the slots are x8 Lane PCIe Gen2
The connectors used a on all of them "x16" (aka by sixteen)
Two Full Length, Three 1/2 length
Here's a pic of the riser card with two slots on one side, and three on the other.
The Intel card requires an x8 PCIe lane - Pass! (all are x8 PCIe Gen 2)
The Intel card will fit into a x4/x8/x16 slot - Pass! (all are x16)
The nShield card requires a single lane - Pass! (all are x8 PCIe Gen 2)
The nShield card has a low profile bezel - Fail! (all are Std Height).
Unless the card comes with a Std Heigh Bezel to swap, this will not fit. Many adapters today come with two bezels, one low profile, and one Std profile/height.
Assuming you can get the nShield SSL card in a Std profile variant/bezel you can fit an additional 4 of the Intel 10G NICs along with it.
Hope this helps.
Regards,
Robert
