Pacha, those are some nice shots of before- and after-lapping. One thing I noticed on your PCB code, it starts with 2L7 instead of 357 like we see here in the U.S. most recently - I have yet seen any L80x with the 2L7 code, which used be shown on those glorious batches of the year 2007 production. So it bodes well for you.
As a data point, I just finished testing a L804A Q6600 which inevitably sucks. The VID is 1.325v and runs quite cool under 3.0GHz. It only needs 1.175v for 2.8GHz OCCT 2hrs stable, T < 47C on all 4 cores with my lapped Big Typhoon. Unfortunately, it requires 1.325v to stabilize 3.2GHz (all cores < 58C), and a whopping 1.425v for 3.4GHz. Didn't want to go even higher as I wasn't inspired at all. The chip was returned back to the store.
Keep us posted with your results!





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