I haven't read tons about the AMD Bulldozers but what I have read wasn't a problem with Windows 7 but more that expectation was that the Bulldozers would meet or beat some of the speed of the high end Intel CPU's but it didn't. So, AMD was promising performance booster patches for Windows 7, for their Bulldozer CPU's. The patches came out, they helped a little but didn't make them Intel killers like everyone hoped.

AMD Bulldozer cpu's work just fine. They are slower than Intel cpu's but not by a huge margin yet on the other hand, they are normally 2x-3x less expensive than an Intel cpu. For instance, your current cpu (Intel Core 2 Quad CPU  Q6600 @ 2.40GHz) sold for around $400 when it first came out. The AMD FX-8150, 8 core 3.36Ghz cpu is $250 right now.

And, I was wrong about those FX-8150 render speeds, they should finish twice as fast as what you currently have. (50% faster, at least).

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