I can confirm, that 2 DP works for me.
My CPU is i7-6700(IT guys choose the cheapest one....
)
Inject 0x19128086.
Kernal patchs
DVMT fixup
com.apple.driver.AppleIntelSKLGraphicsFramebuffer
01030303 00002002 00005001 -> 01030303 00003001 00009000
Port remap.
com.apple.driver.AppleIntelSKLGraphicsFramebuffer
01050900 00040000 87010000 02040A00 00040000 87010000 03060A00 00040000 87010000 ->
02040A00 00040000 87010000 03050900 00040000 87010000 01060A00 00040000 87010000
no need for 4 monitors patch.
1. Connect both monitors to DP port. Only turn one monitor on, other keep off.
2. Boot. Entry to desktop
3. plug the dp port for off monitor, turn on the monitor, plug dp port back.
4. crashing.
5. Turn off the monitor immediately.
6. Boot. Entry to desktop
7. plug the dp port for off monitor, turn on the monitor, plug dp port back.
8. Two monitors with DP.
Note:
I select iMac17,1 in config.plist. and patch with black screen patch. (just search imac17 black screen)