Nvidia Quadro K600 in High Sierra

Hello all,
Hope you are doing well.
Today I have the following config runing 10.13.6:

Intel Q9550 2.83GHz

Asus P5Q Pro

6Gb Ram

Nvidia 8600GT

64Gb SSD for MacOS

SMBios: iMac 10,1

All running ok, but my 8600GT from time to time gives me problems, and I have a Nvidia Quadro K600 to replace it.
But OSX doesn't boot with it.
I've read quiet a lot, and with whatever green and lilu installed it should work. Some threads talk about changing the smbios, but I don't know for wich one should I chance.
Can anyone help me?

KInd regards

submitted by /u/zico88pt
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