@nikey22
Fixed! Still isn't clear how because this is what I've done in the last hours in order:
Messing with kepler tweaker and flashing a new vbios
Because that didn't work I reflashed your original vbios
Disassembled the iMac and reconected every cable following the advice of #8160
In the process of reassembly I removed the odd sata cable because I did remember that i did read somewhere that the 21.5 macs where having power issues with 3 sata ports connected and the gpu upgrade, so just for troubleshooting I disconnected it ( I'm not running a 21.5 psu in my 27 )
Once I reassembled I booted straight to W7 and fired up nvidia inspector and gpu-z and the card was getting to P0 865 MHz, so I booted to HighSierra and ran Valley which hit 60 fps.
Then just to discard I did a smc reset and a pram reset just in case.
Now, the screenshot attached is from catalina and is hitting the expected score.
This weekend I plan to install the wifi kit and I will troubleshoot all to see if its possible to reconnect the ODD, so I will report back with results.
Quick question, can I reinstall the fakesmc so I can monitor the clocks from HWSensors ( The ones that I have are from nick or
@Ausdauersportler opencore loader image ) or do we need some special ones for the K4100M?
Cheers.