I’m running the stock 2.66 nephalem cpu@EdGlassgow @GSXB can you both let me know what processor your running? If your running stock Penryn processor my fix applies a masker that makes it think your running a westmere chip. Early 2009 Mac Pro used Penryn which is equivalent to early core i5/i7 westmere is later core i5/i7.
I’m also running bootrom 144.0.0.0
With nvme boot discs and a usb 3 card
and a GTX680 Mac