Originally posted by Medallish
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From what I've read production costs for one die per series would be higher (especially with the first production runs, if you factor in that yield improvements would have to be duplicated across all dies), plus they can sell chips that don't meet the QA requirements for the top-of-the-line instead of just binning them.
It's a trick that's been used for a while. I think the first Athlon II were actually Phenom II with L3 cache cut off. Phenom II x2 could also have extra cores unlocked. Provided the motherboard allows it, it might still be possible with BD.
There's no guarantee though, and there might be some trade-offs (higher vcore for stable operation, lower overclockability etc.)
@blackshard: power draw from the FX-4100 is better than Deneb. Ditto for FX-6100 vs Thuban Link
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