Multipathing to PS6110

We've got a single PS6110 with dual Type 14 controllers doing active/standby, this is dedicated to two windows 2012 R2 servers running a SQL cluster.  The servers have two iSCSI dedicated nics (the whole iscsi network is on it's own isolated hardware) that run at 10g.  The Servers are configured for multipathing, however the Type14 is a single 10 gig connection so I'm wondering if this is the proper configuration.  Ran a disk speed test agasint a small volume I set up and mounted to one of the servers and were only seeing around 240mb/s and we are getting some pretty high read latency through out the day.  IOP count on the SAN is low.  Network through put, while it says 10gig is next to nothing on average.  Jumbo frames is on and the nics have been configured per dells best practices guide.  I'm wondering if upgrading to a Type 15 controller would enable true multi pathing to the san since it's got dual 10 gig SFP+ connections?