You want my take on it??? probably not but here it goes...
The reasons these chips are not ocing as well of late....user incompetence...I bet that this is more then half of them.
user incompetence in researching and getting the best components....PSU, MObos, Ram, others...
user incompetence in researching known incompatabilities...
user incompetence in understanding settings in the bios and using the appropriate bios...
user incompetences in method of ocing....
Now this is not everyone, but since the mad rush on these chips which really begin in January there are more and more self proclaimed "noobs" ocing....In November and December it was the normal ocing crowd getting into it, and thus not as many problems. I will take some blame as well as others should, but we made it sound too simple...too foolproof....Then everybody and their sister decided to jump on the bandwagon of cheap A64 chips oc'd to a 900 dollar FX levels...The problem is they have never done it, they tried to cheapen everything up in the system regardless what many of us told them....
When it comes to ocing do not think "bargain"....They are a bargain for the cpu, but they usually require more expensive enthusiast type mobos, better ram (for some), much more expensive and larger top quality PSUs, better cooling then stock, etc.....Do not cheapen this up....
I would bet that Zebo and I (and about a dozen or so old timer ocers) can probably take quite a few of these chips on our systems and get much more out of them......I am not bragging, I just truly believe it. I believe it by listening to the methodology ppl use in ocing and stability. I believe it by looking at the "rate my rig" and "hows my system" threads. I see the components ppl are looking at buying and just shake my head... They haven't read a damn thing!!!