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For the performance of the AMD FX-8150, check out the following links:
(cooling system) http://www.legitreviews.com/article/1743/1/
The FX-8150 is not optimized for server applications; for that, you want to look into AMD's Opteron series processors.
According to some what I've read, the FX-8150 is going to have a street price around $245 which is a great price for an 8 core, 3.6ghz cpu (turbo mode brings it to 3.9ghz). Of course it will be overclockable well into the 4ghz range, which will make early benchmarks vary some from the performance you might want to wring out of it (overclocked for gaming, NOT overclocked for servers because reliability is more important).
In the same price range is the Intel Core i7 -2600, a 4-core 3.4ghz cpu, so the core speed is slower than AMD's. ComputerWorld tested the i5-2500 (a cheaper Intel chip) and found that it was faster than the AMD Bulldozer for most tests. Rumorpedia.com shows that the Bulldozer trounces the i7-2600 by over 9000 points on the 3D Mark Vantage CPU test. These results suggest that non-overclocked Bulldozers may have a minimal performance improvement over Intel, which could prove very difficult for sales considering how competitively Intel's offerings are priced. However, the worst thing for AMD is that the Bulldozer isn't on the market yet, and Intel's is. By the time Bulldozer gets here, will there be faster Intel i7 cpu's? You betcha.