I have a Dell Precision T3600 with he same PERC H310 card and it has the same 64k stripes limitation for my RAID0 dual Intel 330 ssd setup.  It cannot  use any other striping higher or lower.  The PERC H310 is a re-branded LSI SAS2008-based card with a really old firmware.    It doesn't look like they are planning on updating it either since it's almost 2013 and they are still using a 2011 LSI BIOS.  It's kind of a terrible card since it responds more slowly than plugging the ssd directly into the SATA3 ports on the c600\x79 motherboard and boy does the PowerPC chips that handles its data traffic HOT.      
Hi,   I have a Power Edge R720 with a PERC H310 controller. The only RAID stripe I get when configuring RAID 10 arrays is 64KB, is this a limitation of the PERC H310 or am I missing something?   Thanks
H310 RAID Stripe Size