Same here. PBO cant boost my 5950x even to 4.8! Im trying to OC 5950x for MAYA workloads (single core perfomnce). With this settings: PBO - manual, PPT TDS EDC - 280 235 240, overdrive - 50mhz, curve optimizer: all cores -25, LLC - lvl1, cpu voltage - offset + 0.05v. I get max 4.6 Ghz and 75C cpu temp (85 diode). If I set all to auto and curve optimizer to -30 as freeagent suggested, pc wouldnt even boot.