gamerk316 :
^^ Thats because its a two core processor with 2-way SMT. Those second "cores" of a BD module take a performance hit, so a "4 core" BD is slightly less performance then 4 true cores. And as IPC got worse, it follows that a PII X4 would outperform the 4170.
This may be true, but pricing dictates what the FX series has to compete with. A similarly priced Phenom II is a better deal than an FX-41xx in most cases. Encoding *might* be an exception. I am going to be building a budget gaming rig soon, and even though the board is AM3+, it's getting a Phenom II X4. Good performance for the money, as a platform. I'm going to be graphics bottlenecked anyway.
Although if they release an AM3+ compatible retuned Bulldozer (fixing some of the design issues that are holding it back), and it is competitive, that might give me a nice upgrade path. Especially with Win8 being CMT-aware.