Hello, thanks for choosing Dell.     H810 is a external PERC card. It is used to connect to external storage. [URL]     The only option for you to upgrade is H710P Mini.  
I installed perc H810 in my R720, but in the process Ieft screw driver in the machine while it was running; I removed two GPUs, and H710 mini in order to install H810. The R720 boots, except it can't read the HDD, and the link lights do not work. The HDD's can be read on my R710, but not the other.  How do I proceed to identify what component has failed.
HDD can't be read