Dave, in the past, during the various reviews of the Z87 platform, much was made about all digital VRM's for the CPU and RAM. Previewing some of the Z97 boards, I see a decrease in the number of manufacturer and boards choices that are utilizing digital VRM's. It seems like they are de-emphasizing this issue now as not as important. Maybe the digital VRM's are too expensive and board profit margins are too low to use them. What is your take on this? This board, I believe is a good example of not including all digital Voltage Regulation Module(s)? Is this technology still very important like many manufacturers and reviewers made it out to be? Does it make a big difference in performance, power efficiency, and board/chip longevity?
For me, it's still too early to be able to answer any questions about board longevity on this platform in regards to VRM design. Obviously many different parts are available out there, and many boards use different parts, but the actual life--time of the board and it's warranty should cover any such concerns in the first place. I don't really put any value myself in having a product out-live it's warranty period, as much as that might suck, as it keeps stuff in production. In regards to overall efficiency, generally digital VRM designs out-class "analogue" designs, but there are cases when each can out-class the other.
As to performance being affected by power quality, I can't say that that is the case.. performance is largely set by BIOS profiling, or by Intel's default values. I suppose in the extreme worst case performance might be impacted, but if that's the case, you need a new motherboard.
At the same time, I do feel chips themselves need to last longer, and sustain higher frequencies, yet at the same time I punish my own chip fairly hard, even with just the multiple installs into many different motherboards, that is still on-going ,and I've yet to see my chip degrade in any way. However, with Z97, there might be a relation to power designs again, but I haven't had enough time to fully delve into everything the platform itself offers in that regard. I do know that there is an option to use an external PLL source for some chips, and perhaps there's more to power delivery in general with this platform that has yet to reveal itself. I'm too dumb to know the difference.
I still have quite a few Z87 boards to review here, and will continue to do so while pushing out Z97 reviews, so this is something I plan to look at perhaps, since one has to wonder why some future CPUs might not work with Z87, but do with Z97, and I need more boards in my hands and time with them, or some documentation that explains why this idea exists, before I know why that is. The most obvious change would be in power regulation...