The Heka variety are of a different design to prior 65nm processes I believe.

AMD is using this 3-core processor as a way to sell all of there failing 4 core processors. They have been trying to make a quad core ever since Intel did and they thought that they did it and they did, when they started to test them they found that one of the cores was always frying up, so they took of one of the cores and made a 3-core!
GOOD JOB AMD, YOU ARE CHEATING YOU CUSTOMERS!!
you know that Intel had the same problem in 1998 and they pulled all there products and made a brand new chip. THEY LOST MILLIONS!!!!
AMD YOU ARE GOING TO JUST LOSE ME AS A CUSTOMER BECAUSE I DON'T BUY THINGS FROM IDIOTS!!
so if any one reads this and you are looking at buying this product, don't even think about it, it is a rip off!!!!!

That's a bit of a gamble but may pay off. If the 3 is cheaper than the 4, I know I'd probably opt for it. Maybe they do have trouble making a 4 and they're 'settling' for a 3, but I can't fault them for that... it's business.