That's ok ... I just figured there was something else you were looking for :) I haven't done this first hand with this combination, but here is how it should work (from migrating PERC5/6 VD's): Chances are, the  new card will just pick up the configuration, but if it doesn't, it will mark the configuration on the disks as "foreign".  To use that configuration, you simply to go CTRL-R, highlight the contoller on the VD MGMT screen, hit F2, Foreign, Import.  This will tell the controller to use the RAID configuration that is stored on the disks. The H310 and H710 use the same driver, so very little prep will be required (other than making sure the firmware is up to date). 
I bought a T620 a few months ago and "foolishly" (to save a few hundred bucks) opted for the cheaper H310 adapter instead of the H7XX PERC Adapter I normally have ordered.  I'm finding the performance of the H310 to below par so I am considering replacing it - does anyone have experiencing with this sort of thing? Suggestions? Is this even possible?        
Any success stories swapping our a H310 Adapter for a better PERC Adapter?