My experiences with the artifacts:
Last night I did my first Sandy Bridge install, GA-H61N-USB3 (F3 BIOS) + i3-2105. RAM is a single 4GB chip. Using HD 3000 gfx. Used the following method:
- Got DSDT and Audio kext from this thread.
- Created 10.7.3 UniBeast installer with latest UniBeast
- Set BIOS settings to AHCI, 384MB+2MB gfx
- Installed System (GraphicsEnabler=No was necessary)
- Booted to new system, used MutliBeast to install DSDT, Ethernet next, 3rd party SATA, etc.
- Rebooted, used Kext Beast to install Audio kext
- Rebooted, and had full accelerated gfx and audio over HDMI and built-in.
Actually one of the easiest Hackintosh installs I've ever done (I've done some hard ones)
A few minutes in, my elation turned to horror as the green and black lines started dancing around my screen. Some googling turned up a pretty widespread issue with artifacts using HD 3000 gfx.
A quick check in BIOS revealed that Gigabyte defaults to using an accelerated video mode. I turned this off and so far, no more artifacts. Can't say for certain if this is "the fix" the the HD 3000 artifacts on this board, but so far so good!