LostCircuits posted a review on the AMD Phenom X4 9850 processor

The latest re-spin of AMD's multicore die fixes the bug known from Erratum 298 and opens up a bit of overclocking headroom. Gone is also the requirement for a BIOS fix causing the known performance hit. To make things even more appealing, running in native performance mode actually unleashes better performance in memory-intensive applications than what AMD Overdrive ever brought back after the patch. All in all, AMD seems to be on the right track with the latest -50 series.

AMD's Phenom X4 9850 Review