Hi,
When I get my RMA'd power supply back (my Silverstone 450W power supply died after 1 month) I will do some power testing with the graphics card and also use my power meter to see the differences that there are using different SMBIOS identities. I have simply been using MacPro3,1 up until now and that gives me 9 CPU p-states. But I guess it is possible that power management for the graphics card was not working and I might be better to think about sorting that out too.
It is possible to build new identitities and to add different cards to other models by kext editing the AGPM kext, and so I should be able to experiment with that a bit next week I hope. For the moment though I have gone back to integrated graphics as until my power supply is returned to me I am using just a 125W power supply - which obviously is not good for a separate card!
Thanks Minihack
It's great news to me. I've tested with different SMBIOS and GE=yes or No option and see the video performance and p-state together.
Basically, There were no better SMBIOS than MACPRO3,1 like you mentioned.
ALL IMAC SMBIOS : 5-state
Even Retinal Macbook Pro : 2-states
Macmini : 2-states/Lower performance
Mac Pro4,1,5,1,5,2.: 5-states or 8-states and shows Memory slot error report
and With GE=Yes with PCIROOT=1 option with all SMBIOSs shows same graphic performance with GE=No
No GE option/No PCIROOT=1 or 0 option shows better performance than GE options one.
Let me keep testing my self with different SMBIOS. Hope this record would helps when you test later.
Thanks as always