Roc, I think you may have just gotten unlucky, annoying though it may be. Admittedly, better cooling would help, but I don't think there's much more that can be done with your chip having read your posts. However, I think to start shouting about how poor the AYHJAs are is a little premature - even if you do have five other reports of 'bad' performers, 1510MHz is still pretty damn respectable by my standards at least, and there are reports coming in all the time of good experiences with these chips.
Like I said in your other thread, occasionally people need reminding in the midst of the hype that all chips are individual, and there is no gaurantee that a certain chip will oc well. There are plenty of AXIAs floating around, but I haven't heard of all that many (in proportion to all the AXIAs out there) getting over 1.5gig, so your chip is still performing better than many AXIAs. Noone ever said the AYHJAs would be a revolution - just that they might perform a bit better. Personally, I'll wait a few weeks until we get a good enough overall impression of the AYHJAs to comment on them properly - right now there just aren't enough around.