Yeah but FX4xxx is just a half of bulldozer. It was designed as 8 threaded machine,cutting it in half is going against the initial perf. targets . Of course with 2 FPUs it(FX4xxx) can't score so high. Remember that it has 2x256bit FPUs that are shared between 4 integer cores. In case of X4 chips(llano/phenom) you have 4 cores each having 2x128bit pipelines on their disposal. Bulldozer was designed for integer processing and it's very obvious when you see its FPU. Let's hope SR core brings us at least some improvement in that regard.