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I'm willing to bet that this is an engineering sample of a mobile chip on an LGA Socket that may have been used for internal testing.
Especially considering the memory clock speed constraints and 2.6Ghz clock speed.
Interesting. Looking to my main source of info,
this chinese forum post, the guys there think it might be a i7 3720QM, based on some benchmark testing. I might try to OC this thing to the 3720's specifications to see how it compares. I haven't tried anyting more than 3.0 GHz yet, and some say it's locked past that, so that might not be possible.
BTW, sorry I haven't been keeping up with this thread. I make a lot of stuff (mostly artisinal knives) in my free time, so when I come up with a new design, everything else kinda gets put on the backburner (sleep included) until I'm done.
EDIT: Also, your theory makes even more sense if you consider the fact that most of the i7 4XXX CPUs have q-specs of the form QEXX or QGXX. Most QDXX chips are much rarer, almost all are unknown as far as the model. Come to think of it, I might start finding all the known Q-spec/model pairs and try figuring this out via process of elimination.
EDIT^2: Nevermind that first point. According to
one of the posts here, the QDE4 is a i7 4770K. Now, I know for a fact that the much more common QDE8 is either a later or earlier version of my chip, but IDK if the QDE4 is as well. Note that the frequency of the QDE4 is 0.2 GHz faster than my chip, which could mean it is a later version, but could also mean its an ES version of a completely unrelated chip. God, I wish I had a buddy who worked at Intel.
EDIT^3:
I found a great source.. I doubt its anywhere close to complete, at least with the newer chips, but these lists contain so much more info than I had before. In fact, its enough to draw some conclusions on: First, this chip can't be an ES version of a mobile processor because all of the ES versions of mobile processors use the G1, G2, G3, or BGA1023 sockets, never a 1150. Second, the ES version of the i7 3720QM is already known- the QC25- so it can't be that. Third, Q-spec numbers go from earliest to latest in alphabetical order. Fourth, it's possible that there isn't a model to match up with, because this chip is from way earlier in the development process than I could've ever imagined. There are only 7 chips with Q-Spec numbers of starting with QD, and they come right after the end of the i7-3XXX generation, but before the start of the current gen chips. None are matched with a consumer chip, which is true of only very few others. The QDE4, QDE5, and QDE8 chips are the only entries missing a model number as well. This may actually be only the third ever produced Haswell ES chip.