decent 40G network adapters

[Eugene M. Zheganin]

Hi.

Could someone recommend a decent 40Gbit adapter that are proven to be
working under FreeBSD ? The intended purpose - iSCSI traffic, not much
pps, but rates definitely above 10G. I've tried Supermicro-manufactured
Intel XL710 ones (two boards, different servers - same sad story:
packets loss, server unresponsive, spikes), seems like they have a
problem in a driver (or firmware), and though Intel support states this
is because the Supermicro tampered with the adapter, I'm still
suspicious about ixl(4). I've also seen in the ML a guy reported the
exact same problem with ixl(4) as I have found.

So, what would you say ? Chelsio ?

Thanks.
Eugene.