there seems to be a new ASMedia SATA chip comparable to the JMB585 (pcie 3.0 2x, 5 port sata) ASMedia ASM1166, with pcie 3.0 2x support and 6 stata ports, seems to be a alternative to the jmb585 and the one additional port could come in handy when using a 6 x sata onboard solution and wanting to have 12 sata ports and only using one pcie 4x slot, there are also versions as pcie 1x - best option for a pcie 1x slot atm as it can utilize the pcie 3.0 and get up to 1000 MB/s with the one pcie lane