trog, the 3600+ is a new chip, smaller l2 cache, most people who have decent boards and some exp clocking have gotten them into the 3gz range, a few had worse luck, but thats alwase subjective due to board/ram/user experiance clocking, My buddy tim got his 3600+ OEM chip(130bucks and they guy threw in a 4 pipe amd opti cooler) it clocked to 3.3gz on 1.4xx volts, probbly would go higher but his board cant go much over 330 fsb(its an msi am2 board, not the best choice he could have made.....)
binning happens at all levels, the 1700+ axp(tbred-b cores) was a classic example, they where cores that could do 2-2.5(higher even) on air and not break a swet, but the demand for lower rated cores was so high that amd just sold them at 1700+, i have yet to meet the tbred-b 1700+ i couldnt get well past 2gz on basick air cooling.
the newer am2 chips are in highe demand, the 3800/4200/4600 chips are in extreamly high demand, so high that amd is having to mark cores down to keepup with demand, check around lately people been getting INSAIN overclocks with the cheapest x2 chips.
the 3600+ is 256k+256k l2 chip , amd has dumped all 1mb a64 cores so as i understand it from my buddys aunt(works for amd offices) we will see 256k+256k taking the place of 512+512, and 512+512 taking the place of 1mb+1mb, this is good for us because it has at most a 5% hit on perf at default clocks, but smaller l2=higher overclocks=more performance
i dought ur gonna find an x2 3600+ or even 3800+ that wont do 2.6gz on air, stock air even.
my cheapo 3500+ am2 chip clocked up to 2.7 no problem, with ram at t1, i can take the core higher but the mem cont wants 2t with 5-5-5-15 timings with lowest devider to be stable at 2.9, the perf loss due to latancy is higher then the gain due to higher cpu clock, sall good tho, have yet to find a game that needs more cpu then i got currently.
im gonna wait pacently and see about buying an x2 3600+ when they price drop(retail only for me, i like a warr
) hell i may even just wait till middle of next year and buy a quadcore
EDIT:
Note that the 3600+ is a 10x multi chip, as is the 3800+ only diffrance is the l2 cache per core and i have yet to meet the overclocking mobo that cant do 300+ fsb/hht/whatever u wana call it