Haven't seen these in one spot yet, so here's what you'll need if you have this combination of components (A relatively popular one as it used to be featured on logicalincrements.com, but not anymore)
For booting into Clover, you'll need the FakeCPUID 0x0306A0. There's no other real, non-complicated way around this. You'll also need the iMac 13,2 SMBIOS (Ivy Bridge Model).
Use XNU Power Management instead of AICPM, the boot flag for this is: -xcpm
You'll also need some kexts, so go ahead and put these in your EFI folder
Audio Chipset: Realtek ALC662 (VoodooHDA - Attached)
LAN Chipset: Realtek 8111GR (RealtekRTL8111.kext - Attached)
OsxAptioFix2Drv-64 (Should be installed when you install Clover)
BIOS on UEFI defaults, with CSM set to UEFI.
With all of this, you should get a working installation up in no time. The rest depends upon your GPU, etc. I went ahead and wrote this up in a couple of minutes just a quick reference, I'll probably add more to this though.