I've been struggling for a while trying to get any throttling of my Xeon E5-2620 (v1 thus Sandy Bridge).
Using Asus P9X79WS, 10.9.2 (13C64, the release version), and RampageDev's clean SSDT-based installation with updated FakeSMC.
Using PikeRAlpha's ssdtPRgen script (newest revisions), with various settings. Pike kindly added the v1 definitions for me, but I'd been hand-jamming them before. Tried without and with explicitly forcing SB cpu (-c 0) and xcpm (-w).
Nothing I do budges the speed from 20x. Nothing lower unless I use NullCPU (then it naturally throttles between 12x and 20x). No turbo no matter what I do (yes, I specified -turbo 2500 with ssdtPRgen).
1. Has anyone got this chip (or very similar) to work? Esp. with the new PM methodology in Mavericks?
2. Any general hints in troubleshooting? I've re-done the installation and script gen fairly carefully, but I can't help but feel I'm missing something. Perhaps SB has just fallen into a gap in support and everyone is working only on the IB models as they're more focused on enthusiast home use (I do understand why, just that my use case is different and I bought back when V1 was out).
Thanks much for any tips!
PS. Here is my SSDT-1 as of today: SSDT-1 as of 20140315