>> The Silicon Image 3112 (two port) and 3114 (four port) cards are
>> supported.

> Watch out for that chipset...it has some significant hardware
> problems which affect large data transfers and can result in data
> corruption unless certain workarounds are implemented.  These
> workarounds reduce performance...

I have the 3512 (2 port).  Max throughput is limited to ~40 MB/s, but no
data corruption or other problems.  I don't notice the throughput limit
in "normal" use.  Your milage may vary.

> the SilI 3124 or later chipsets are  better, but not great.

I've been told that the 3124 is good.  What's wrong with it?
Does NetBSD support it?