Planning to upgrade to sandy bridge, I also checked if port multiplier was available on H67 platform.
It looks like this is not the case, because:
- In DH67GD motherboard manuals it is written that all sata ports support a single drive. This sounds normal for sata ports, but if you are thinking to port multiplier this may also read as "no port multiplier supported".
- In H67 chip spécification I found nothing about port multiplier except one line about LEDs within a command register definition, and that's all.
- In Intel Rapid Storage help, even the last rev. of dec. 15 it is written that port multiplier is not supported.
It looks like port multiplier technology is not a great priority for Intel desktop boards chipset.
It would be interesting to know if this technology will be made obsolete by the new USB3 one.
With mini-itx, if you dont use PCIe slot, maybe it is possible to install a Silicon Image controller which supports port multiplier.
Thank you for the response.
I plan on eventually upgrading to a discrete GPU, so I'd like not to, however the hard drive enclosure I was looking at supports USB 3.0 as well, which I originally overlooked. Since the Intel board has USB 3.0 supported, looks like port multiplier is a moot point anyway.
I'll probably be buying this board in the coming weeks and build a new PC around it.