I have a (remotely located) R620 server with an H310 PERC controller (Described as "405-1110 : H310 Adapter, low profile", part R1DNH - What I've got is definitely a PCIE card.
First question - What SAS connector interface is this? (According to the specs it should be an SFF8078 - but this is relevant to the next part of my question -) 
Second Question - When I look at the specs for the H710 it talks about an internal SFF8088 connector - but am I misunderstanding something? I understood the SFF8088 to be EXTERNAL connectors? Is this an error on the spec sheet?
Third question: When I search on EBAY and the like for PERC H710 R620, most of the listings are not for the PCI form factor card. Do I need to use the PCI form factor card in my unit, or can I use the other type shown?
Fourth Question: The Dell Distributor quoted me on an H810 card as a replacement for the H310. Dells website describes the H810 as an EXTERNAL card - and a more expensive one at that. Is this card appropriate to replace my H310 ? Does it give me any benefit over the H710 card - if the H710 card will work ?
Answer
- The connectors in your picture are SFF-8087
- You're correct, SFF-8088 is an external connection. That is a documentation typo. The H710 does in fact have the same SFF-8087 internal connections as the H310.
- I don't believe those other form factors will work, they appear to have a different connector type - I would play it safe and go with the one that matches the form factor of your existing card though. e.g. Dell part number 0GJKT
- H810 is an external card, and is not a replacement for the H310. You need an H710.
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