name='Hemicuda' said:
If my understanding is correct I would think that unlikely also,as surely adding native support for SATA 6Gb/USB3 would require a fundamental change at the P55 Platform Controller Hub (or ICH10R in X58) level.
Well, the thing is, and from what I've read, the P55/H5x PCHs are actually capable of PCIe 2.0 speeds on the DMI uplink to the CPU. Intel simply chose (for whatever reason, my guess being since the P55 is actually only a slightly modified ICH10R you should be able to use whatever ICHx Southbridge you want with Nehalem-class CPUs - something you can actually do with X58, btw) to keep the DMI link at PCIe 1.1 speeds. OR, given the similarities between P55 and ICH10R, Intel simply decided not to change that part of the IOCH/PCH while giving the CPUs themselves PCIe 2.0 speed capabilities on the DMI link for future compatibility.
So, and I'm guesstimating here, if Intel wanted to increase the DMI link bandwidth, the backbone work should already be completed. It will most likely need a new PCH, but probably not much more. Which actually is a good thing if it turns out to be right!
name='Hemicuda' said:
Adding true PCIe 2.0 connectivity to the P55 would make the X58 chipset all but redundant excepting it's implementation of Gulftown CPU's and (debatable) use of triple 8.5Gb/sec channel memory over the P55's dual 10.8GB/sec
There I have to disagree.
First of all, I was only referring to the DMI link speed, NOT PCIe connectivity provided by the PCH, so that's a rather moot point.
Also, the P55/H5x PCHs, like any ICHx Southbridges before them are only capable of providing up to 6 PCIe lanes (4+2, or 6x1), plus 4 lanes for DMI. X58 provides 32 lanes (16+16, 16+8+8 or 4x8), plus 4 lanes for DMI. That's a magnitude of a difference.
However, I don't think X58 can actually work with PCIe 2.0 speeds on the DMI link (it makes sense it should be, since the rest of the chip is full PCIe 2.0), and if that's the case, the lower end i5s would have a tremendous advantage on the connectivity front if the PCHs started sporting USB3 and SATA3. Which means, until the X58 successor arrives, probably taking up the ICH10R functions and ditching DMI altogether, or gets a new ICH with a speedier DMI link, no luck on the lower end spectrum. Sigh.
Cheers.
Miguel