Phc7006: However, AMD did not keep updating the FX range, meaning they now lag behind. You can still build a competent , reaonably priced system based on FX 6350 or FX 8350, but their 125 W TDP makes them difficult to recommend to someone who's not used to build his/her own computer. FX8370E is more resonable in that sense. FX9xxx are an unreasonable way to generate a massive amount of heat.
The best solution AMD offers is actually for lower end systems. an Athlon 880K , coupled with a good mid range graphic card ( AMD R7 370 for instance, or R9 390 ) is not bad at all.
FX8370E gains energy efficiency by lower base clock and slower reclock. On common scenarios it performs worse in both single and multithread loads.
Athlon 880K is a black horse, kinda like athlon II series or intel pentium 6xxx series. It achieves performance by using very low amount of cores and cache, thus able to clock much faster in same thermal room. But once the load increases fast several processes/threads, it quickly looses to more functional regular FX 4xxx (also 4 modules aka 2 cores, but good amount of cache). The process reduction from 32nm to 28nm is not really worth the option to upgrade to very common AM3+ socket to very specific FM2+.
Here The only Intel advantage is really lower power usage thanks to lower manufacturing process and better single thread performance, where if modern application is singlethreaded and performance-oriented, thats really a problem of application, not of CPU. The modern high-spec Intel CPUs are monsters in singlethread, but they also cost monster money.
Bright example - kerbal space program. In 1.0.5 version, it used Unity 4 engine, which is bottlenecked to just one thread/process for both physics and rendering. Intel is currently WAY better performant at single thread/process loads, average difference being somewhere between 30% and 200% faster - so everyone was upgrading to Intel CPUs. However, there is certain barrier, after which single thread maxes out - so the difference between AMD and Intel in 1.0.5 KSP was topmost 30 vs 60 fps. But as soon as 1.1 KSP came out using Unity 5 engine, it was no longer single thread/process bottlenecked, suddenly AMD is performing just as good as Intel.
AMD advantage are really much lower CPU+MB price and support for ECC in this package.