DJ_Jumbles :
Yeah... I think that you're confusing the fact that the socket is the same, but if you wanted to upgrade to the C2D, you had to upgrade your chipset. or wait... DDR3, had to change the chipset, or WAIT!!! PCIe2- GOING TO UPGRADE THE CHIPSET!!! What does it matter if the socket stays the same if the functionality is crippled? You're talking apples, yet seeing oranges. All you have to do is swap out the word SOCKET with CHIPSET and *poof* it's the same argument turned around again. The fact that AMD changed socket designs doesnt mean that the upgrade path wasn't the EXACT same as the 775 in essence because if a new chipset feature came out, you had to get a newer 775 processor that yould utilize it and vice-versa. Want to use a newer 1300FSB C2D? Gotta buy a new P35 motherboard. Want to use DDR3? Have to buy a new P35 motherboard. Why the hell would you buy a processor and cripple it on an older chipset? That's just foolish on your part.
The 775 socket has been around a while now and is starting to show it's age, frankly. Intel just won't innovate past it. It's not like as if it's the pinnacle of technological advancement in the CPU socket race. I can't wait for Intel to start integrating the memory controller and off-loading some of the CPU overhead off the FSB.
So... you mean to tell me that it's a good investment to buy a Pentiac D 775 with a P35 chipset? Or a e6850 with a 955 chipset at 1066FSB? See? Granted, the older chips will work on the newer boards, but what's the point?
The changes you listed to the socket 775 are all factual, and would be germane to the debate if it was about things Intel did to PO its consumer base. But it wasn’t. It was not about changes to mobo specs, but about what AMD did to PO its own consumer base by stating a course of action which caused people to spend money, then failing to adhere to that course of action. In short, AMD pulled an Intel. AMD made a statement. They stated would support the 939 for a significant period of time after the introduction of AM2. They reversed that decision and didn’t. They left everyone who bought the 939s, based on AMD's promises, swinging in the wind and POing them in the process.
Frankly, if your argument is that AMD & AMD mobo manufacturers don’t change mobo specs or chipsets then I’m disappointed and your argument is incontestably wrong. As proof, I offer socket A. AMD's long lived socket that went through many significant chipset and bus changes, maturing from EIDE 66 all the way through EIDE 133 and then to SATA, from PCI to AGP, then AGP 2x, then 4x, then 8x, and ATX to ATX 12, along the way incorporating many new chipsets to support those changes, for ex in VIA chipsets from KT 133 all the way up to the KT 880s. This is just to name a few of the changes socket A went through, in the process limiting upgradeability of that particular socket, just as socket 775s were limited. In the particular case of 939 however, the type of changes you reference really didn’t apply as 939 wasn’t around long enough to undergo a lot of significant changes.
As to whether or not Intel will or won’t "innovate" past 775 is debatable. One theory is they haven’t changed to socket to avoid POing their own customer base as they did when they promised everyone that socket5 would support Pentium I, and then jumped to socket 7 for Pentium instead, leaving those people who bought socket 5s based on the ability to upgrade hanging in the wind. They did it again when they made socket 8 for P Pros and went from socket7 to slot 1 to socket 370 in such a short period of time.
As to every change to the C2D line forcing a new chipset/mobo that jsut isnt true. Every change has not necessitated a new mobo. The specific case you use of going to an E6x50 1333FSB chip does not mean a new mobo with a P35 chipset as you claim. Most all 975X and a fair number of 965P chipset mobos support 1333FBS with a simple bios upgrade, meaning most Intel chipped mobos produced over the last 18 months are still upgradeable. Don’t confuse this with older chipped mobos that have been out of production but are still in retail stock and supported by the manufacturers. For the few people who want to pay the premium for the underperforming, over priced DDR3, yes, that does require a new chipset, but I for one, have no desire to move to DDR3 anytime soon. Especially with both prices and latencies on DDR2 still falling while a higher clockspeed recently became avalable. At this point in time, DDR3 is still mostly pointless.
Finally, it was never a good idea to buy a Pentium D, on any chipset.